Great work!
The game mechanic was super and the level design really showed a respect for the player. I felt the split-bot dynamic was only ever used to aid and not to hinder (at least for a player that's not running in like a bull in a china shop :)
It's rare in these days of 'Souls-like difficulty' that I play a game where I get the level designer has cared a lot for the player rather than trying to splat them at any given moment - appreciated that.
The game mechanic brought back a faint memory of an ancient Spectrum isometric game called 'Head over Heels' with a similar theme of 'two players in a single player game' cooperation.