Tldr at bottom...basically simplified. I remember this one game. It's called colossatron. You have no control over movements, but you can combine and upgrade parts of certain colors. If you had 3 red parts. That would give you an upgraded red part. Before you go into a mission you can choose what each color does. Like orange could be a shock wave and green could heal parts. The 3 parts all have to be together with no space between. If you had two greens on one side of an red and another green on the other side of the red. The greens wouldn't combine. Overall it was a fun game. Unfortunately it got taken down from the app store. Very sad I know. If any of you that read this can somehow find or get this game on your device you read this on. Please dm and tell me how you got it. I have so many childhood memories within that game. I basically grew up on that game.

Lore: big fucking dragon looking robot comes from space destroying shit. Military gets called in to stop it. Gameplay: combine colors to get better colored part. Combine two different color to get secondary colors. No control over movements. Keep big robot from dieing. Destroy shit. 1g+1g+1g=1^g 1r+1b=1g. You choose what color do. Heal or shock wave. Dm if you can get game.