The game page describes leaderboards, character upgrades, multiple worlds, obstacles, multiple character designs, "and more," none of which I saw when playing. I assumed that these were longer term plans that weren't realised within the jam's limited scope - if I missed anything, let me know and I'll dive back in!
When I talk about it being difficult to track orientation changes, I hope that that's not coming across as a suggestion that the game needs to have a lower level of difficulty. My intention was to talk about room for improvement in presentation rather than gameplay.
If you ran the game on Arch, then I have to believe it had exectuable permissions there. Had you run it from a drive that was mounted with exectuable permissions or something like that? If not, I'd be very interested to know how you transferred it to your Linux environment and how that system is set up!