itch.io

One of the devs here, we sorely screwed up the UI scaling, making it fail pretty bad. 

The first level might not work because of this. However I figured out that it will work if you zoom out the browser a little. I zoomed mine out to 80%.

Not sure if that was your issue, but i hope that might make it work for you :) (only use this fix if it's broken on your side)

Thanks for the heads up, probably shouldn't have submitted it as a browser game but locked in now.