If you use the scroll wheel during a run, you will affect the zoom in the upgrade tree.
Took me a very long time to see the spear ammo, and to realize I had the choice of spending the ammo before it fully charged and shot itself automatically.
I destroyed the center block and the game is now frozen.
It's alright, compared to some active-incrementals it feels a little eh. The value gained from new block tiers is underwhelming. Stars being randomly gained feels incidental; would rather have to chase them down(or have to shoot a star-block) with my cursor.