Great idea.!
I'm giving this game 98 stars out of 100, Not just because of how fun it was but also becuase Of how creative this was. I througly enjoyed it. The intresting shapes were enough to keep me playing.
Some food for thougt. Possibly have a counter for how many times the shape cursor was changed. That was people won't be able to just hit 1-5 Crazyily to hit the shapes. It might also be smart to include less shapes in the arnea.
I found the game to be EXTREMMLY fun. 98 Out of 100 Funny looking shapes.