Excellent game. Gameplay is very fluid, and really like the way you've went about the crafting system. It is cool how it expands the more you kill enemies, giving you more options as you go.
As someone else said I did feel at first is was a bit hard to tell what each ability does when combined, but other than that it felt very polished.
UI is also something I really appreciated. It felt very smooth and supported the game well.
Very well done guys!