Almost all of the mechanics in this game were frustrating when they interact with one another. As I gather more resources, I can jump less and less. Touching the sides of robots takes away resources, and takign damage is almost always the result of jank, not player fault. Crafting requires resources, but can only be done when you pass a certain place in each level. Getting to a crafting station with enough resources to make something you need is unrealistic due to a combination of hampered jumping and damage taken from janky robots. And forget returning to the crafting station later, that's not happening. With hampered jumping, many level sections are out of reach. Without certain key items, many level sections are out of reach. Challenge rooms involving hopping on robots are a huge pain because you only get the big jump off their heads 80% of the time, even with excellent timing. Challenge rooms with conveyor belts are just ridiculous, especially when they're floating around and you need to jump off of them to the next one, and especially when they change directions due to an *offscreen* robot flipping a switch. Good luck timing that. The level design is very bad at communicating to the player. I never understood where taking which path would take me. "Is this leading to progress or to some bonus stuff?" "Will I be able to come back if I go through here?" "Does this thing trigger the end of the game or is it letting me go to another level?" etc. 

Superb. I loved Raizing games.
Demonizer is fantastic!