It must have been so hard without an engine! I commend you and pity you for your impressive hard work! If you ever wanna switch to an engine, Unity uses a language called C#, which is very similar to javascript. The art is good, but could use some polish. I recommend having more concrete shading when doing pixel art. Using multiple shades for shading pixel art makes it look kinda muddy. I also recommend using lospec for nice looking color palettes.
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Hello, thank you very much. I'm going to look at C#, I knew it but I didn't know it could be compared to Javascript! It's sure that a game engine would accelerate the creation process!
For the art, I'm a beginner, your advices are precious. If I understand correctly you advise me to accentuate the shading, and to use a predefined color palette ?