Neat platformer. I didn't find the debug option, unfortunately.
I will say, the movement felt a bit difficult (for me at least). Not entirely sure what is was, perhaps the character moved too fast considering the small distance between spikes? It might have been the static camera. I like the look of seeing the whole level how you have it, but a follow camera with smoothing always feels more intuitive to control (imo).
The SFX were nice and retro. The addition of a checkpoint system was very nice; and well implemented too. The music was good as well.
The visuals were nice and you did the color palette limit well.
Nice game.