I like the controls a lot - except for the behaviour when you touch walls. A capsule collider or something else with smooth edges would really help here I think.
I'm old enough for this to be nostalgic. I was reminded of battle modes in old DOS games. Really nice feel on the movement and the perspective is really evocative to me.
The 'move the plank' was really not obvious until I reread the description, so I spent some time confused in stage 1.
Overall, great job, fun game!