Oh dang! Yeah normally you use the "mouse wheel" but you should also be able to use Q/E as well? We will definitely look into this though! Sorry it isnt working for you!! :(
Interesting! Hmm, my only guess is that maybe the game is registering the laptop pad as "mouse mode" consistently? Sorry you are having problems! I will have to get ahold of a laptop and try to debug that!
in the meantime, the game works with a controller as well as phone/touch screens too if you still wanted to check it out (two finger rotate for coupons).
Sorry again you are having issues! :(