It's a decent platformer. I Like the use of the character transformations to get through obstacles. modifying player size and ability. It added variety to the 2d platforming.
Using the mouse to control the camera placement on screen was mildly frustrating to me. Maybe if the card change button was space I'd understand but making the button tab made it difficult for me to use mouse and keyboard at the same time.
The trap warp at the end could use some indicators that its a trap. I've played kaizo games like "kill the camellia" and though they are brutally hard they are consistent in there design.