Really cool visuals, and the controls felt very smooth once you get the hang of them. This would be very fun to speedrun (maybe it could even be encouraged by reducing the time limit?)
I think the cassets should always be the same when you restart a level, as sometimes I was expecting to use the double jump first but I had the wrong one half of the attemps. In one of the last levels I also once fell in a spike pit that didn't restart the level, so that's worth looking into in case you plan on updating this. Nitpicks aside, this is an awewsome game. Congrats to the whole team!