The game forces a page refresh seemingly randomly, losing all my progress. At first I thought I was doing something wrong and tried again, and I was hooked on wanting to see what the remaining upgrades did. But it happened 4 more times - twice after I’d gotten red blocks. That’s too frustrating for me to continue.
Edit: I downloaded the app later. The ending was funny. Can't believe I got a sick run with each Tesla Coil in a corner, but it still made less than a random earlier run where I had 2 and good TNT rng.
Last thing: where's the "remove ice physics" upgrade 😭