Great art and idea! I personally think that the angle of the levels makes it a little harder to conceptualize where the arrow keys will place you at times.
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there's nothing interesting about falling anyway, it would be better to just disable it. Also you should rotate the camera so it's not at a 45 degree angle instead of adding an indicator, the directions are ambiguous like this. Here's an example: (not my game) https://itch.io/jam/gmtk-jam-2022/rate/1617762