its good, the increase in difficulty from level 1 to 2 is too much, maybe level 2 should be the level 3 and the level 3 the level 2 :) (I got to level 3 max.)
thank you for your suggestion! I made this game for an assignment project, so I don't think I'll be doing anything on it (sorry!) but maybe in like a quatrillion years I might come back to it.