-jumping is based on a momentum mechanic despite furbys low movement speed
-several "leap of faith" moments where you dont know whats ahead
-no run button
-controlling furby and cube brother is artificial difficulty considering if one dies you have to restart the level
-plane level has a laser beam which makes it laughably easy
-you can go under the level in the plane level making it a joke
-you can fly under the goal flags in the plane stage
-furby has no invincibility frames after being hit which leads to server instances of him flying
-too much life makes it laughably easy to win
-furb still has his firing sprite despite the bullets coming from cube brother a majority of the time
-cube brother doesnt have a firing sprite, instead he just slides.
-you have to go into the first bosses hitbox inorder for your milk in order to reach him with you ammo
-ice cream heals making it way too easy
-double jump barely noticable
suggestions
furby has 3 hits before having to restart the level
cube brother and furby have seperate storys or join together in co-op
furby has invincibility frames after being hit
run button
ice cream is purely for points
furby fires in an arc making it harder to hit enemies making it better than spamming a laser
cube brother gets firing sprites
revamp level design with more focus on double jump (but not %100)
halve furbys jump height and the double jump is actually a second jump
fix the loving plane stage