From what I could tell, the tutorial instructs you to use 'purchase [item]' in order to buy from the store, but once you're actually in the game it changes to 'buy [item]'. Just a heads up
This game is very addictive and a lot more fun than I initially thought. My only suggestion would be a damage based mode with multiple lives in a round so that you could get to see the triple backflip throw into a wall.
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 "Wrestle Jump"){kind=icon}
'Purchase' has been updated to 'buy' in the tutorial, thanks for the report!