I had a lot of fun with this! Loved the lighting and sound effects. Also really appreciate the addition of co-op! Only feedback would be around balancing the rewards and intervals between upgrades. It felt like I was unlocking upgrades a bit too frequently in the beginning and the amount of money I had to spend didn't really seem to match the cost of the upgrades as I always had plenty of money to spare. Overall a really fun game, nicely done!