Calling it as the second game I've played: this is my favourite! The levels are well designed, the wall jump mechanic appeals wholeheartedly to my action platformer blood, and the graphics work great!
The character feels great to move around with. I don't think I've played a game that has this much horizontal movement and feels so good. It doesn't have the unstoppable momentum of meatboy, but also gets you further than your typical MegaMan/Hollow knight jumps, and the way the camera is setup seemed to work very well with the movement you went with.
I'd love to see what other kinds of platforming this movement could lead to. Actually trying to connect the feeling to past characters they felt a little bit like Kirby and Jigglypuff from Melee, though not quite as floaty.
In particular I want to give props on the character animation on death and finding the bomb, and I want to say I felt like a true GAMER for completing all three levels.
As far as points of improvement, I think the addition of sound would go a long way to boost the feeling of this game. Some swooshes when the character jumps from a wall or lands, or goes fast enough to disturb the air as they leap over gaps would feel amazing.
The death plane on level 3 felt a little bit unpolished. Whereas on spikes there's an animation, when you fall off you get the game over before the character has fallen out of frame or there's any indication that you hit the bottom. Maybe a sonic style death bounce could work there with some of your excellent animation.
I did also feel like the spike death animation was a bit slow. The character hits the spikes, but falls over like they've fainted/lost conciousness. A more sudden or reactive animation might sell the damage more. Prince of Persia 2D comes to mind, but you probably don't need to be as gorey.
So yes. Excellent game, especially as a solo effort. My improvement points are all minor, so the game is major-ly well done! <3