Thank you very much for all of your feedback! Glad you enjoyed it!
We did think of moving the gauge indicator to be next to the player, but didn't manage to get back to it before the jam ended.
Definitely agree about the sharp difficulty spike, if we had a bit more time to playtest it definitely would've been changed up. There aren't any checkpoints, as the gameplay loop consists of improving your best time after you beat the game, although that has proven to be challenging to everyone who has played the game.
Most of us haven't used Unity before so we didn't think of renaming the build so it was an oversight, but it's also because we ran out of time to make sure everything is clean, which is also why we didn't manage to get a web version ready. Thank you for the offer to help though!