Hey! I played your game and I want to offer my thoughts. Sorry if i repeat something someone else has already said, but i wanted to have a fresh impression so i didn't read other comments.
I think the art style and character are really fun. The screenshots looked great. I wanted to play it!
The puzzle elements were heavier than i thought they would be. I was expecting an shooty action game so it took me a moment to figure out i had to backtrack and talk to Otto. This wasn't disappointing though, because you put a lot of fun details and variety into the courses.
There were some things i didn't like. More save and recharge locations would be nice (At least at the start, so people can make progress and adjust themselves to the game without dying and being sent back too much).
My biggest gripe was the overheat mechanic for the blaster. It feels really good to rapidly fire a blaster and i'm not sure why you would want to prevent the player from doing that. This was most noticeable in rooms filled with crates. Instead of being a pleasurable-feeling task of bursting lots of boxes it was instead frustrating as I waited for my gun to cool down between shots. Personally i would remove the overheat entirely.
Overall i think it's a fantastic start. Loads of charm. Have fun making Ro_Bit!