Whoa! That looks amazing! And it's only black and white?

Yeah, that looks great.  Nice job!

Last night, I added tiles that, once you step on top of them (they function the same as the solid black floor tiles), a timer starts.
After 10 frames, the tile disappears, to reappear in 30 frames.
So, next it door/key, and after that I don't have any more ideas, except for something that breaks if you fall on top of it at terminal velocity or something

Also I need to optimize at some point, but I'm going to get more stuff added before that.

Those temporary tiles look sweet

Ok, now I know what to add next: an options menu.
Ideas so far:
In the game:
Speed
Controls
In the editor:
overwrite on/off
wraparound on/off
manage levelset
level password

What else would you like to see?

better menu

The one that's readable is the one selected.

EDIT: As of now I've also been able to get both the whole thing flaming and the whole thing raining.

Version 9

Added...
menu shown above
options*
tiles: disappearing and door/button
somewhat fool-proofed editor, error messages on exit if needed
level selected in one program is saved in an appvar so a) you don't have to re-select it every time and b) it synchronizes between the programs

Included:
level shown in screenie, edited slightly so you have to use the portal to get at the button
attempt at a readme


I'm thinking of making a title screen that has some effect actually relevant to the game--any ideas?
Also ideas relating to options and tiles are appreciated

*or lack thereof

That title screen looks frickin epic.