Happy you enjoyed the game! About movement speed, I dont know if you noticed, but there is a speed upgrade (Though it does not always appear on every upgrade screen because there are more than 3 upgrades)
Nice and original game! However, I'd suggest to compile to webgl using pygbag and putting it as a "run in browser game" instead of pyinstaller, py2exe, nuitka or any other python to exe compiler as those are almost always flagged as viruses.