I dig it, game's pretty solid and feels quite original gameplay wise, i really like the visuals with the minimalist backgrounds and the ninja/roller blade dude ( can only see him from the back so that's my guess :p, but he looks cool anyway ) it's quite fun to plan the most optimal route to not get walled in, couldn't complete it though since the later levels get a bit hard for me.
I'm not sure if this was due to the jam's theme or not, but the tiny issue i have is the "both directions" to do the wall smash, i feel having the action have it's own dedicated button could be better without the game loosing it's original gameplay idea imo.
Other than that it's really good, Bonus for having your game open to fan made levels that's cool :)