Also, KAUTARUMA, could you please take the time and try out my entry, Owlet and the Biscuit Tower? It's a frustratingly fair 2D platformer where you take control of Owlet and must scale up The Biscuit Tower in order to retrieve The Legendary Biscuit so that Owlet can eat it. But, The Biscuit Tower is filled to the brim with spikes. However, Owlet has the ability to pass-through the spikes, which will not cause him any harm, but Owlet can't definently jump on them, as doing the latter will result in an instant-death, and the player will be sended right back at the bottom of the tower. This game is designed to be hard, and yeah, it shows from the comments.
Just take the time to play Owlet and the Biscuit Tower and let me know what you think. I'll always appreciate ANY feedback you give, whether good or bad.