There are definitely some balance issues you'll need to reconfigure. The Orb is so powerful that once I had 2 I could just stand in one place and be untouchable. What might help with this is to increase the speed of everything. Projectiles and enemies alike, just not the orbs. I say this because it all feels a bit sluggish across the board. Some of the collisions were a bit buggy as well. Your collision boxes might be a bit too big on some things. The trees were most notable, and I often found myself unable to move past them in a way that made sense to me. Perhaps if their collision boxes were only around the trunk. If you did that to avoid the player being over top the tree canopies you can always split the sprite and have the visuals on two separate layers. One layer for the trunk can be beneath the player while the other is above and hides the player when he's overlapping.