I also thought the protagonist reminded me of doom guy xD It was fun but I found an exploit that made it way to easy. If you make a clone and then jump you will land on its' head and then create another clone and so on.
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I think I took some inspiration from the Doom guy actually, like with the helmet and the green shirt. Also, you are so right. I wanted to fix that feature. I think adding some more levels after the jam ends will be a good way to make it fit into the game better as a true gameplay feature (stacking clones), however I also have an idea to just lower the jump height and make environmental obstacles that are shorter than the player height, so that the player must jump on these smaller obstacles in order to reach some higher platform. If you have an opinion on that lemme know!
Thanks for playing my game and giving feedback!!