The art is really well done. It was hard for me to tell what actually caused me to gain abilities, it seems like trying to win as normal gets you money and stuff so not sure how it plays with the win states.
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Killing enemies gives you money. When you lose, you can buy upgrades in the shop. When you are able to win a level, you have to choose between 2 downgrades (Which only apply to the current run). So losing makes you stronger and winning makes you weaker. The goal of the game is to complete 6 levels in a row. As others have already mentioned, a tutorial would be helpful. Thanks for the feedback though.