That's strange. The only requirement is pygame, which is included on the Gameshell by default. Did you follow the installation instructions on the game's Github page?

I'll admit the difficulty is all over the place. I did not have enough time to implement a proper difficulty curve. Originally the levels were meant to get progressively harder. However, in the current state nothing is stopping the first level from being the hardest.

Thanks for playing, and I'll definitely keep your feedback in mind for any further development!

Thanks for the feedback!

In terms of the physics, I see where you are coming from. At one point in development I thought it was too easy to change the player's direction in mid-air, so I added the effect you must be talking about. I agree it can get annoying at times, but in my opinion the inclusion of the effect felt better than the original code. Although with that said, some tweaks are definitely in order.

I'll keep your input in mind for any further development.