Nice entry! Congrats on getting your system built and a decent amount of content in, but I felt like the puzzles never really progressed in terms of difficulty. The block-pushing isn't a particularly unique mechanic, so you would have had to come up with some very clever puzzles in order to make the gameplay stand out.
A few notes:
- On levels where the camera scrolls, the camera doesn't follow the 160x144 grid
- The music loop restarts when you complete a level
- Hitting "R" should probably just restart the level immediately instead of taking you back the main menu and hitting continue (especially since it's easy to make a mistake and overwrite your progress by hitting "S" instead of "C")
- If you move in two directions while touching a block, sometimes it will get pushed into weird positions