I really love this, your setup is great! You're taking full advantage of the active play in this. Have you tried active play with other robots as well? (hint hint)
I am so glad you like the game, I keep adding touches here and there as I see people's comments.
I tried your level design and the bonus didn't apply when the battery emptied itself :( but I just love the idea so I went into the code and made sure it will apply every time now ;) There will officially be a 'Neato' update with a powered up Battery (and a few others suprises) thanks to you! I should roll it pretty soon.
If you keep playing, don't hesitate to send other designs, it's great to see what you came up with, and good luck with the school, these are indeed unusual times!