I'd love to play it to the end, but the controls make it impossible. I don't know about on Windows or whatever else, but on a Mac, Ctrl-up and Ctrl-down are hotkeys that release control from the game. Maybe set it to Space, Shift, or pretty much any letter key.
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Ctrl-a is a hotkey as well. It is Unix code, which MacOS uses, for "PgUp", scrolling the browser window up so I can only see the top half of the gamescreen. It's just in general a good idea to steer away from using "ctrl" as a key in a web-based game or any game, really. Too many possibilities of overlap with pre-existing hot-keys. Just a little advice for the future.