There's unfortunately no way to change how the screen behaves on my end. I've tried messing with the values in the lua files, but I have no idea what I'm doing and it doesn't seem to have any effect..
I'm able to workaround the scaling problem by changing line 9 in gamesystem.lua from "scaling = GAME.scaling or 1" to "scaling = 1". However, during game play, I cannot release a card after picking one up. Looks like touch events are not correctly handled.