Nice first submission, did manage to get out of the tiling and turn dark for a time which was surprising. Also, I thought the yellow trails scattered around the level would be collectable or be interactable in some ways since walls do. Maybe they could speed you along or something. Good continuation.
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Oh good, yeah there are 8 different themes you can find in the world!
You know those yellow trails are actually called 'powerups' in the code, because I thought exactly the same as you did! Just couldn't figure out a way in time to record things that have been picked up and still keep the procedural generation intact.
Thank you for trying out my game and for the kind feedback! :)