Hmm.

This song is pretty decent.
Melody wise, i like the melody you used. Does seem to fit.
The drum rhythms are great too.
I notice the mixing is a bit off. The main lead is a bit too loud. It seems separate from the rest of the song, and does not blend in with the other instruments. This gives me the impression that you just used drum loops instead of creating it yourself.
Overall, great song. And be sure to edit the volume of the main synth before you use it in the game.