Nice game! I like the combination of mechanics (platformer game and controlling the rocket), but I found both of them kind of hard (and the browser dropping frames didn't help at all hah).
BTW, there's a bug with the Unity loader on Chrome on macOS Big Sur, check this out: https://issuetracker.unity3d.com/issues/unity-webgl-builds-do-not-run-on-macos-b...
You can fix it very easily changing a regex.
I tried it on Safari (where the performance was really bad) and then Firefox (where it was kind of ok, but still laggy).