Controls are smooth and responsive, but that's about all the good I can say about this one. Green enemies that shoot green bullets and explode into green splatters that do not go away quickly makes it impossible to tell what is going on. Nothing hints at that 'end your combo to gain health' system, and I didn't know it existed until I saw it in another review. Thankfully, these aren't the most difficult problems to fix, since the foundation is good.