Hi:
I use an 68000 amiga 2000.
An alien breed game would probably be impossible in my current system.
I cannot make a racer game, is beyond my abilities.
But a game like tower defense, that is something I can do.
Long live amiga !!!!
There's not much in way of tower defence games for the Amiga so it would make a difference to the usual tetris or breakout games that people usually do when they're starting out.
What language are you using, I think you may have mentioned AMOS in the past but I don't remember for sure.