It's a neat concept but it was really hard to play on my high-DPI screen. Even zoomed in as far as I could go I could barely make out the player character. It might be worth double checking your viewport settings for your web build. The first boss was a lot more time consuming than I expected it to be—I found it really hard to line up my lightning perfectly on the third round and even then I managed to win and die at the same time, unlocking the next round. I think you've got something special here with some more iteration. Thanks for making and sharing it!