I'll take a closer look into the art here. Most it is a bit hard to use due to color number (my game uses a small number similar to the NES console).

Here is a list of the most important art that I need to be remade/redraw:

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/image...

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/backgrounds/ballista_bg.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/bat.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/destrin_ship.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/destrin_tank.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/giant_metool.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/jaguar.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/killer_fish.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/larva.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/milonga.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/scorpion.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/shield.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/shocker.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/images/sprites/enemies/spiked_floor.png

http://sourceforge.net/p/rockbot-game/code/HEAD/tree/v1/build/data/image...