No mad at all, quite the opposite, I'm happy you had something to work with, drawing rectangles is (usually) no fun at all!
Nice prototype, looks like all core mechanics work nicely. You just need to design levels now, tweak some variables here and there, add some story and you're ready to ship the game.
One suggestion if you don't mind: you used black for the background - I recommend to either change it to #1b1e28 or alter the tileset a bit if you feel like it's too little contrast.
I hope you'll continue working on this one, feel free to share progress :)