Nice game. I really like your visuals !
The level design and player movements could have use some more polishing though.
There's a lot of points of frustrations.
Not being able to change your velocity or direction during jump can be a nice difficulty challenge but your current level don't really complement that. since it's a grid if you want to jump a block but are too close to it you'll just jump without moving. if you want to keep that restriction maybe consider changing the level by putting more inclined and holes instead of sticking to a grid and avoid stair shapes at all cost.
No checkpoint can be really harsh if you have a long level where you can hide easily. I would recomend adding one after each bubble.
The timer was really realy short. And I'm not sure it serves your gameplay a lot. Usually you put timer if you can zoom throught the level and want to put a chanllenge on it. here your level is hard enought that the timer feels more like a punition than a challenge.
Also be mindful to always put the destination in the player field of view when you ask him to jump. (just after the first bubble you cant se where you're suppose to land.)
Sliding to break glass feels very good and badass, but the first time you have to use it you end up straight into ennemies. which is not really an incentive tu use it again. It kinda kelt like I made a mistake by doing that.
All in all. The core gameplay is in there and the design looks really cool. It just need some refining & balancing.
Good job on submiting :)