Ahh, yes, the up arrows I just checked and those walls don't have collision on them! So that's why they're going through them...lol, whoops! I can add that in as a bug fix, since that is allowed.
Yeah, I actually spent so long on parts of this game that the levels were constructed very quickly with minimal playtesting. I wish I could add/fix them up ASAP, but that would be unfair to the rest of the competition.
I would love to work on it more after voting ends though - I really appreciate the in-depth feedback!