There was a bug, that put all key bindings onto one key, when you start the game for the first time, but this should be fixed. You can change the key bindings in the option menu, the arrow keys should always work, for the main menu to navigate. The character should only flicker, when he gets hit, that's the hurtflashing, to show that he got damaged. Right now, I have no idea what causes the flickering of the whole game & mini map, the problem is, that I can't reproduce and debug the issue, because it doesn't happen on the devices me & friends are using. Maybe leaving fullscreen with alt+return helps. I will upload a new version, in a few days, where I changed how the game handles the view, that follows the player around, also some new wall tiles & traps, maybe this fixes the issue. Thanks for your feedback!