Rat Game Concept (Looking for Advice) Thread

Hello, I've been working on a 2D platformer game idea by myself for a while. I've been designing area's, characters, monsters, mechanics and lots of story stuff.
My game is about a Rat that loses his tail and goes on an adventure to get his brothers and sisters back from 4 animal bosses.

The main mechanics of the game is the combat and the climbing. At the start of the game after losing your tail you replace it with a rubber band, giving you the ability to whip and swig from branches. You will also be able to climb up wooden things for a short time, being able to jump at the peak.

I was thinking of doing the game in a similar to the example. I could be swain to pixel art if someone helped me with it because my pixel isn't as experienced as my hand drawing.

I have trouble describing things with words sometimes so I made this as a level concept.
In the level you are in an attic where you have to use a Moth to get away from a hoard of Gecko's.

This is probably my cleanest example, I think it gets my idea across the best in my opinion. This is a just a short summary of the game itself but I would really like some feedback if you have any and I'll probably be putting up more in the future, thanks for your time.