I cheated a bit on the requirements so it's ok if I don't get an award or something, but I decided to try something different by mixing mechanics from another game. The core idea of the game is still the same — things are coming from the top and you need to explode them before they reach bottom, but in a different style!
Took me about 2 weeks to make from scratch, sprites specially took me a long time to draw (and you can see I'm not very talented on this front), but I didn't want to use original materials. I'm fine tuning it now, will try to write more about it later