Hey guys, loving the mobile version as much as I do the pc version. Only have one small problem with it.
I let go of the screen a lot to stop my character from moving. Because of this, twice during the last round I played, I accidentally clicked on a random upgrade because I touched the screen again to move my character RIGHT when I leveled up. Didn't even see what I clicked on.
For the mobile version, I'd suggest having to have to click on the upgrade you want like usual, but then click on a "confirm" or "okay" button that's beneath all the choices. This will prevent accidental random upgrade mistakes. Keep up the awesome work!!