My first run ended on round 2 because no molecules spawned for like 15 seconds :D
I enjoyed this, but currently I think the main mechanic of harvesting molecules could be a bit more exciting. At least at the beginning, it's quite slow and you're kinda just going from A to B to C without much variation.
That being said, I like the spinning wheel upgrade mechanic! I thought it was cool to have three to choose from and to see them flying by. Only complaint with it is that there is often one objective "correct" upgrade, e.g. would I like +10 movement speed, or +20 movement speed. Could be good to separate different types of upgrades on different wheels to make the player prioritise what they should pick, almost like making a build :)