It's a really cool idea! I enjoyed having to be careful with my shots and setting up kills because of the bullet ricochet. However, the bullets despawning when they hit a box or an enemy kind took away meant that I never had to deal with the ricochet as a hazard, and I mostly used it to kill enemies on treadmills. Also, the limited ammo felt pointless, because each enemy or box dropped some more ammo, so I never really had to think about that.
Overall, its cool idea, but I feel that the main mechanic wasn't really emphasized too much. Nice job on the aesthetic though! I enjoyed all the candy themed items!