Aye, i'm pretty sure you could do most, if not all of what i've done here so far. Sometimes it would require a tad more work, but it's entirely possible.

@Shopaw: Thanks, and i hope so. :U

@Chartle: Ouch. :|

Also, new demo is up, now with level 3 and (almost) proper level endings. However, the highscore tables have been removed (kind of), because it was ugly and unnecessary. :U
Also, with level 3, i've also made the level 4 enemy, Blockface MK2. These guys are going to be annoying, but perhaps not quite as much as the sentries, which are bound to give you hell in level 3 and forward.

Get it here.