Got to 654 feet :)
The Good..
-Lots and lots of interesting effects
-Great music & sounds
-Lovely low-res graphics, although hard to read at times
-Challenging
-One of the extremely few commercial CC games I've seen. Congrats!
The Bad.. (well, maybe just things that bothered me a little)
-Weird controls and no way to customize them. Have you looked into using the input plugin at all?
-Very Confusing. I dunno what half of what I saw was or what I was supposed to do with it, and sometimes enemies would just burst out of thin air and kick my **** After being so careful and planning all my moves for ~4 levels, that really pissed me off ^^;
-Entering the keycode and such was kind of weird. Could you not just use edit boxes?
-Inconsistent sounds. Some were very high quality and nice and others were obviously made with SFXR.
-Pressing space during the "Davioware" intro and the game over screen restarts the music
Anyway, I've only played it for about an hour, so I'm sure I'll figure everything out in time!
Kudos for making it this far ;)