Thanks for checking out our game and the feedback is really valuable! We did realize the core gameplay loop was simple, but decided to adhere to a small scope which was realistic based on our skillsets.
We did implement additional systems and mechanics that we had to cut out. One such system allowed the player to chain multiple BBs to each other, creating a network of BBs which were able to charge each other, while extending the reach of the player. However, this system soon became rather chaotic and we didn't have time to balance it.
We also implemented a different kind of corrupted BB - Bad Bot which hunted down friendly BBs to drain their energy. To counter this new threat, we provided an ability for the player to switch from a "charging" to "draining" mode (you can still activate this mode in the game if you find the right key ;D). So you could link up to the Bad Bot and switch to drain mode to kill them. This also drained friendly BBs so you had to manage the links and sever the right connections. In the end, we decided to cut this feature to focus on the main gameplay loop.