I forgot, but I played it again and reached level 12 with a score of 12518.
Would be cool if there was a way to select the blocks by keys (maybe Q and E to cycle through them or something). Then you don't have to move the mouse as much. Or maybe a Tetris like system where you always select the first and can hold one block.
With small adjustments for mobile devices, I can imagine this being a really cool mobile game as well. Again, great work :-)