I like almost everything here :D I wish the puzzles were a bit more interesting but they're okay!
The basic problem is controls. And for me it's an okay game so far, but the controls make it feel like a failed jam experiment :(
As someone who works as a game designer:
1 - write the keys on the robot arms! Every time I want to do ANYTHING I struggle to remember what does what. Because the focus of the puzzle lies in understanding WHERE and HOW you should move your arms, and NOT in struggling to move them. More radical solution - switch between the current active arm/boy.
2 - there is nothing more frustrating than a skill check after a puzzle. At its core the game here is just sokoban - what pieces, when and where do I move them. By adding a skill element you're making me pass a skill check every time I want to move a piece. Not fun. And then every time I fail a skill check the whole puzzle resets. Not fun. One possible solution (because changing jumping will annoy your current fans) - reset only the piece that died. If orb dies - reset arms. If boy dies - reset boy. This way you have even more room for interesting puzzles.
3 - level design. I gave up playing on level 3. Because when I opened the barrier I realized I had to pass a skill check in operating the robot arms. I know exactly the solution to the puzzle. I know how to arrive at the solution. But the actual moving of the pieces in a tight corridor is so difficult it's frustrating and not fun. I'd focus more on the "what's the solution" and "how do I get there, what do I have to do and in what order". Every time I died I had to move the boy to the button AGAIN and AGAIN. I'd much rather ONLY move the orb to the end goal. I'd much rather do the challenge again, instead of the setup. Because I win at the setup every time and it gets boring, but I fail the challenge every time!
4- win screen. I'd add a super bombastic win screen when the player finally completes the level. Make him feel good about this.
I'd suggest to take a look at snakebird , thomas was alone, 1001 spikes and mushroom 11. Analyze why the feelings in Pivot Pilot are off. I'm buying Pivot Pilot right now, but please make an update where you address these issues, just so the game is more suitable for more people. I understand what you're going for. The thing is that the current balance between puzzle and skill makes the game way too frustrating for too many people. Fixing these issues doesn't take away from the enjoyment that current fans get, but allows more people to have fun!
I'd love to see more interesting content from you on twitter. I got my eye on you!