We've been finding it very addictive too! So glad you enjoyed it!! :D
Sometimes it feels like I blink and the rest of the team has built up an entire game, they're all very talented and work very hard for the jam is all I can say.
There should be a slider on the pause menu (esc) for sensitivity, though it's possible that you still can't adjust it to your liking - we definitely would've liked to add more customisation to the mouse sensitivity 😅
The grinders do have a slight suck on them, we struggled to settle on a balance as to how much they should suck (helpfully) and how much they should suck (be bad) to make you work for it, some of us found it quite fun with some of the grinders where you had to get pretty close to them and risk your life to get some of the trash! I hear you though, we definitely could've spent a little more time refining that ☺️