Thanks for playing our game and we're especially grateful for you kind words. We hope to publish a game at some point in the future.
We should have done a tutorial on the controls for sure. It would have been easy, in hindsight, to at least put in a note somewhere to say to use the right mouse button or PgUp/PgDn. This is why it's great to cut your teeth on these things in a game jam like this. It's a reminder to not forget the basics of tutorials on game controls and mechanics.
We're really sorry we didn't add in a checkpoint system to auto save. We spent the best part of a day making sure load/save worked, doing the checkpoints would have been trivial in comparison and yet we missed it out. You are so right here.
Thanks for your very constructive feedback on our game. We look forward to playing your game this week, it look very stylish. Best of luck in the jam!