It reeks of a frustrating bargain bin Nintendo entertainment system platformer. I wouldn't be surprised if it was a shoddy mobile remake of some unknown NES game.
Now, I don't have problems with the game's challenges per say, they are serviceable , but you made a terrible begginer gamedesign mistake, which would be really easy to fix. Death frequency should be inversely proportional to the time it takes to repeat the task you failed. Your challenges would be reasonably hard and even enjoyable if I didn't have to repeat the same I beat 5000 times before getting to the one I failed at. YOU NEED CHECKPOINTS IN A HARD GAME.
Some sound effects would not be hard to add and make a music loop beyond the, once again, NES music loop norm. You can generate or source a creative commons midi longer then you put into the game in less time then it took me to beat the first level. I wouldn't ramble on about weak theming, because I kinda like the spritework and a game could be fun even if a bit stale, but sadly 'tis not the case here.
Overall pretty underwhelming and I hope you can at least learn from this.