Nice job so far! I found myself playing for quite a while and had a good time doing it :)
Few additional thoughts...
- I enjoyed solving the puzzles and it felt good to crack some of the more tricky ones.
- I appreciated that there are no enemies / moving threats (at least in these early stages), so there's time to assess and think about each area
- I got stuck on the puzzle room with the red block in the middle - I felt like I got trapped between the blocks and had to die on the spikes to retry? (the comment below about adding numbers to the rooms during development is a great idea... could even be baked into the art)
- I felt the character movement was a little slow to get started, and also would have appreciated a little more control over jumping, and letting go of the magnet
- The throwing mechanic felt a little unreliable as noted in other comments; feels like perhaps there's a hold-to-power aspect to it which isn't visualised in the throwing arc?
- Art-wise, it could be good to use colours more immediately communicate object relationships - for example if the magnet had blue tips, it'd be really clear it gets attracted to blue blocks. This could apply more widely with the green connectors and so forth, and might help the player get a more immediate 'read' on the whole room.
- Some larger overarching goal would go a long way to maintaining motivation; I found myself wanting to have a sense of progression
Thanks for sharing this, been enjoying following your progress on the videos too.