They sound a little bit MIDI!
If you are using FL studio, try assigning your channels to mixer tracks, that way you can adjust the volume levels so that all the elements blend together. Also you can add some effects to the mixer channels. The drums in the first track desperately need some compression to stop them sounding like a megadrive! You could also try a little reverb (the reverb2 VST is considerably better).
With that high melody, its very keyboardy sounding. Have a look at tweakbench, and maybe try getting hold of MDA Padawan, and MDA keys, they're both free VST plugins with some wicked sounds, that should be more suited to making game soundtracks.
I don't want to sound over critical, I hated it when I played my music to other people and they ranted on about VSTs and mixing and compression, and I was like "what?!" but seriously once you get into it you'll see how powerful they are.
Out of interest, what version of fruity are you using, I might be able to send you some compatible virtual instruments to get you going!
I want robotic legs.
