Cute little game! Though I did feel a little bad for the crabs lol
The reverse Pac-Man gameplay was a cool idea, I enjoyed boxing the crabs in to catch them. There's a ton of room for new levels, I think with the base gameplay you've got now it could definitely be expanded into some solid puzzles- I just wish there was more there now! I've seen in other comments that you know about crabs passing through the objects too, so I won't harp on about that as I managed to beat the game nonetheless, so I do see the strategy you were hoping for players to use.
Graphics were cute, all the little characters and objects fit in well together and made for a really charming playthrough- I especially loved the little "chomp" effect when catching a crab :) Audio fit nicely too, though a little effect when chomping the crabs would be cute. I did encounter a bit of screen tearing every so often, but I believe that's more of an engine issue than something on your end, so I'm not considering that a valid criticism on my part.
For a simple game for a jam this does the trick! Cute, and I like the direction of the gameplay :))