Awesome! It's a really interesting mechanic, and I shouldn't be the best judge of this game because of how bad I am at platformers and games in general. However, in light of people like me it might be a good idea to place some of the help signs a little closer to the start! Or a slightly slower ramp-up in difficulty. I did really like that the signs were in the game world, and encountered organically rather than as part of a list of instructions.
The title screen and shooting mechanic are excellent, almost makes me want to encounter that again in the game itself if it could somehow be worked in.
Really nice effort, you should be proud of your submission!