Hey, really nice game! I played through it all the way through.
The evil creep progress bar at the bottom is kind of hard to see, I think if it was a bit bigger and had a number that showed how many good tiles were left would be nice. It would also help with replay-ability cause you could try to come up with a strategy to stop the corrupt tiles from spreading in different more efficient ways.
Also when I know I messed up it would have been nice to have a restart option menu item rather than be forced to wait and watch my plans go to ruin in real time. I know I could also go back to main menu and back into the level, but that felt like a bit of a pain too.
Other than those items I think you got a tight little game here, great job for only 2 weeks. Best of luck in the Jam!