I played it and I think the core movement idea is fun, but a few things stood out to me.
The first thing I was unsure about was whether I was supposed to be able to shoot. Since the character appears to have a gun, I naturally tried the obvious buttons, so if shooting is not intended it might be worth making that clearer visually.
The music volume also seemed to fluctuate randomly for me. It got louder and quieter in a way that felt pretty jarring.
The laser/turret enemies felt a little passive to deal with. A lot of the time I felt like I was waiting for the right timing rather than actively interacting with them. This might just be personal taste, but I think some kind of more active counterplay could make them more fun.
The difficulty ramps up quite quickly. I personally enjoy bashing my head against a challenge, but I could see some players getting stuck repeating the same section over and over. One possible idea would be checkpoints that reward risky fast play, for example reaching certain areas within a short time could activate a checkpoint.
The spike collision/hitbox feels like the highest priority issue to me. There were moments where it felt like “there’s no way that hit me.” In a game like this, where a lot of the fun comes from barely scraping past hazards, the hitboxes need to feel very fair and readable.
I also think the jetpack could maybe keep a little extra upward momentum after releasing the key. That would let players use their previous lift to build speed and avoid wasting fuel, which might make the movement feel smoother and more satisfying.
Overall, I think the core concept is solid. The main things I’d personally focus on first are spike fairness, clearer player abilities, and the movement/game-feel.