It's available in the shop but not yet implemented in the game.

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Update vulnerable go release to fixed release

Implement cheat codes (for debugging only 😜)

There should be an enemy type for spring-guns. This type of enemy doesn't move and can only be killed with a grenade or RPG.

This class switches between 2 sprites at the speed of the display. Instead it should use a configured delay, like most other Sprite suppliers do.

A unit test is missing, too.

Currently the score doesn't change when the player kills an enemy. This should be fixed.

When player 0 exits the store without buying a single weapon a panic happens:

engine/characters/player#203:

var itemNames = p.getNamesOfWeaponsAndGrenadesInInventory()
selectedWeaponName = itemNames[0]

It should be possible to play a 2 player game where the second player is using a second game running on a remote machine.

Enemy movements should (optionally) be able to change the view direction of the enemy.

Replace logger implementation with some standard logging library - like https://github.com/Sirupsen/logrus

There should be an animation when the level ends.

The primary button on a Competition Pro (Android) is not working as expected.
Secondary button works.

There should be an "options" screen reachable from the title screen. This new screen should offer "options" to switch between windowed / fullscreen mode, change window size, change mappings for input devices.

The build pipeline seems to work no longer.

Show message on title screen when no input device is found:

No input device found.
Please connect a Joystick or Gamepad.

When changing directions rapidly (and throwing grenades like crazy) one can force a message that a player sprite is missing. This should not be visible to the user. Nevertheless it's an error:

2021/07/06 20:30:17.933611 /home/tom/Projekte/retro-carnage/src/engine/renderer.go:86: WARNING: Player spriteWithOffset missing for player 0

Remove codiga badge from Readme

Right now enemies just come from the level sections target direction. It would be nice to have spawn areas (off screen) that create enemies in certain intervalls (or timing patterns). It would be cool if these spawn areas have a minimum scroll offset - so that they don't create enemies right away.

Right now the background music gets cached synchronously - increasing the loading time of the game.
Instead the music should be cached in the background.

Game should offer 3 save games, like super Mario does. Auto save should be performed after each level, except the last one.

Enemies are kept in GameEngine.enemies. They should be removed from this slice if they where visible but get invisible during a screen update.

• Referenced images are not in sync with available images for skin
• Bullet & RPG offsets are not correct

When throwing grenades, some some obstacles (like hedgerows) should not stop the movement of grenades, others (like houses) should do that. This should be an additional property of the obstacle.

Implement tanks as additional enemy type

Currently explosions leave nothing behind. Instead they should create a burn mark on the ground.

There should be a max length (e.g. 10 chars) so that no line breaks happen.

Currently the backend is instantiated in the main form. From there on it has to be passed to other components to be usable. This should be refactored.

There should be a global variable for the backend - so that it is accessible from everywhere.
Then all places, where fatal or panic messages are logged, should be refactored to invoke the backend as well.

The current implementation of the invincibility animation doesn't work - and has a couple of strange effects.
Should be fixed soon.

Landmines should explode when they get hit be a grenade. Currently they just disappear.
This features allows for huge chain reactions of landmine explosions - if they are placed in a level accordingly.

When the level scrolls while an explosion is on screen, the explosion gets scrolled with twice the speed.

All sound assets are listed in the json files for weapons and levels. Instead of having a hard coded list to sounds should be read from those files at startup.

The invincibility toggle makes the player flicker with the frequency of the screen. That's way too fast and should be re-implemented with some more reasonable delay.

It seems that enemies are activated too early (before becoming visible).
The area likely to cause this issue is already marked with a TODO comment.

You cannot switch weapons when you have selected grenades and used them all.

• Bullet offset for player 1 (direction "UP") is wrong. It's too far on the right.
• Bullet offset for player 1 (direction "RIGHT") is wrong. It's too low.

The ammo counter is running like crazy. It seems the engine uses bullets each frame.

There should be a screen that displays the high score table - and lets player 1 and two enter new entries when they've reached the required score.

When the player gets moved and fire gets pressed afterwards, the player should be able to move and change direction.
If the fire button gets pressed before the movement, the player should stay where he is, just changing the viewing direction.

Currently this doesn't work as the player starts moving when changing direction - even when fire has been pressed first.

When a player dies the death animation currently not shown.

When player moves the screen up and then moves down quickly, he can move out of the visible area.
Scrolling should consider the position of both players to never get them out of view.

Music for certain levels gets cached when the level is selected on the world map. Since we should use one song per level, the cached music can be removed once the level has been finished.

This should make it possible to have an enemy off screen and then have him move onto screen.

Right now the various screens redraw their content every few ms - even if the content didn't change. This should be optimized.

Implement Pause button to be able to stop the game for toilet breaks.

Game engine code should be cleaned up

There should be an enemy type for (armed) bunkers.