Loved the graphics and music! I thought you had a good starter for a fun platform puzzler game! My biggest feedback would be the controls. Players use WASD to move and mouse to select blocks, the plus and minus keys are on the opposite side of the keyboard, meaning I have to take my hand off of the mouse of WASD to use it. It's definitely a first world problem, but I would try to streamline those controls to make them feel effortless. Otherwise, really fun! Nice work!