Things I liked: - Decently tight controls. - The art, pretty clean and had a nice classic aesthetic. I like the look of the robot and tileset. Everything fits together pretty nicely. - Overall use of the theme, had a good and simple idea that was pretty well executed.
Suggestions: - Have a visual indicator on the robot itself for the battery life. Maybe that circle in the middle can go from green to red as the battery life drains. - Sound indicator for when you're charging. There is a visual one with the electricity around the bot which is good. - Remove the life system if you want to have the levels be more difficult like they are. Just having to go all the way to the start of a level feels like a pretty good setback for failing. If you wanted collectables maybe they could be small batteries or something that give +1 charge or something. - Maybe a smaller distance between charging stations, at least in the beginning like others mentioned it's pretty difficult to get to the stations.