@Kartoffel
Your game reminds me of "Space Impact: Kappa Base"!
You could definitely use some feature from that old N-Gage 2.0 Game, since N-Gage was canceled.
Look up for some Gameplay footage.

Here is one, but you have to skip to 3:30
https://www.youtube.com/watch?v=gZhTlqPLvAI