So simple yet so charming! All the building blocks are there for a very addicting arcade type game. I just wish there was a personal leaderboard for how long you managed to stay alive each run. The art is great with a very distinct style and the music fits the mood perfectly. The game loop is perfect. I think with a few polish steps, like impact sound effects or maybe a squash and stretch type animation on the crab, you'd really be able to amplify the fun already present. Great work overall!