I finaly have a playable version of the game Now I only have to fix some bugs and than I can add additional stuff.
You can play the HTML5 version here: http://games.corne.info/LD/LD23/6/html5/bin/
Used so far:
- Planet are being spawned
- My rockets flies and attaches hisself to the planets
- Gameover screen
What I want to add: