Thank you so much for your in depth feedbacks, I'm really happy you liked the game :)
I thought about adding more movement options. I feel you because when play testing I often wished I was able to wall jump or double jump, however I know those options would have introduced some bugs and more play testing would have been required.
The game was something different when I started the jam. Then I drew the character and his animations and I decided to turn it into a fast paced platformer. The attack animation doesn't fit the play style, but I didn't have time to redraw it. That's also why I decided to give the option to slowly adjust your position when attacking. If I keep developing the game, I will definitely change it to a running attack in order to keep the flow going.
That's a good point on enemy colours. I used the same shades of red to indicate danger, but some differences would have been better.
Also a good point. I wanted to keep the action going, but I was a bit too cheeky with the level design (especially the pit with the electric wires right next to the spawn point).
Thanks again :)