Great demo Mark! The character feels great to control, I found myself wanting a little bit of a higher top speed on him. But the start/stop and jumping feels really good.
I didn't quite understand the rules around what I could throw the magnet through and what I couldn't (also what I could throw the magnet through vs jump through myself). These screenshots show 2 throws which have different outcomes (the top one being that the magnet goes straight through the barrier, while in the second one it bounces off the thicker barrier). Maybe an idea would be to stop displaying the arc of dots beyond the impassible barrier?
Can't wait to see what's next for this! Looking forward to it