no linux version yet (hopefully) so you're out of luck for the time being. this release is super duper rough though, i wouldn't invest time getting this setup on your handheld until the final release or at least a later demo.
i also wouldnt 100% be confident it will run on a 50 dollar handheld, this will be much more demanding than the average pokemon fangame, if you want to know how well it will run try and get octopath traveler on it as a benchmark
the game doesnt seem to be using any real time simulated lighting because its running <150fps on my 2080 super which chugs pretty heavy on most implementations so you might have some hope