Hmm sorry to hear that. I guess it's cas the game is a little bit demanding, in terms of having a bunch of levels active at the same time. I didn't have enough time at the end to optimise the whole thing unfortunately :/
Totally get it. Our game (Magifuse) also ran out of time and now we had to upload it with the placeholder-sprites.
Well, your game still looked pretty cool from what I saw.