Thanks for the feedback. I agree in most cases the collectable ability is pretty redundant, but there are cases when I wanted to force the player to move somewhere or do something before receiving those abilities. However, I wasn't able to accomplish this fully, so definitely would consider that. I agree that the swap ability is pretty powerful and I was considering to limit the number of swaps allowed but I decided not to. Locking the player is definitely something to consider.
And with controls, yes many have said they can get pretty confusing which I understand, but seeing as the game isn't time-based, hopefully it wasn't too much trouble! Again, thanks for the helpful suggestions and thanks for playing!