Super nice use of the limitation! I honestly was so impressed when playing. The game forces you to make choices and place your steam at strategic place. Brilliant!
It is also a super good thing that you added the checkpoint because sometimes waiting for the game just to 'simulate' itself gets boring
If I can give some feedback, the sprites were all the game colors, specially the main character which makes it confusing sometimes when you look at the screen.
In the end, you guys made a wonderful game and I really love the concept. Congrats!!