You can run any Unity based game in windowed mode (alt+enter). The demo only supports 16:9 aspect ratios and we'll look into fixing those issues for the final release.
You can fix the issue as stated here: https://answers.unity.com/questions/936814/choose-screen-with-command-line-argum...
i'm having this issue with 1920x1080. Everything is displaced and weird. Parts of the screen are missing, ui elements are overlapping and blocking interactable things. This is just one example. Persists in both windowed and full screen mode. Add some graphical options so users can troubleshoot themself please.
this is the shop, literally unusable.
Edit: Can't even progress past getting to the main town since I can't buy health potions. Literally locked out of the game, so I'm leaving it for now. It looks promising if you can reduce the grind, tune down the unkillable healing monsters on the easy quest and fix all the weird resolution based bugs so that the game is actually playable.