I really enjoyed the risk vs reward concept for building up damage, and the graphics offer a really unique look. I also enjoyed the various animations and the cute jump.
My main critique is the lack of sfx, it's a bit difficult to know for certain when you get hit without them and the spells don't have as much oomph as they otherwise would with sfx.
Overall I had lots of fun, especially with blasting monsters using overcharged fire spells!