I can see this getting into a pretty fun state when you fix the bugs and implement the missing sprites. You have to adjust the balancing, though. If you think your first level is too easy, it's probably still not easy enough. In a bigger jam, this would be a reason for a lot of people to stop playing. Please keep your audience in mind and remember that you don't balance the difficulty to be fitting for yourself (who has had multiple tests and learning sessions already while developing the game), but for a wider audience that plays your game for the first time. It would be nice to see this in a finished state. Good job on the idea and everything you have implemented so far!