This is kind of unplayable, which is a shame because the art is great and I think the idea is solid.
Not having any sort of death-respawn system means if you mess up, you need to Alt+F4 to try again. The movement seems very jank, like a jump catapults you skyward but you only inch along sideways or forward, so what should be simple platforming is a challenge. There's not even great feedback on when the bell is "recharging". And like Wuzey brought up, I had to turn my mouse sensitivity down to 5% of normal in order for it to be even sort of playable.
The game really needed more time to cook, I think. I like the idea, a platformer where you need to memorize the locations of invisible platforms could be cool. But there's so many rough edges we can't even feel the core concept underneath them.