Just a suggestion, instead of having the door randomly open, what about dropping a key to collect and open the door with, making it a little more risky and challenging, trying to differentiate the objects. Additionally, standing in the first spot means you don't get hit by any objects, and this should probably have items drop on it as well. Love all the graphics side of things, everything else is in working order. Are there additional levels, with different backdrops or themes with different items being dropped after X amount of points?