I love the game and I will definitely come back to it. I hope to finish it within next few days. The art, story and sound are just brilliant. There are however some minor tweaks that could be made:
1. Jumping with the module feels a little bit 'out of the world'. I don't know why but it really does not feel coherent with the rest of the world. I would experiment a little bit more with gravity and cube weight.
2. This is something I already mentioned - would be awesome to have a quicker way to work with modules. Maybe something like 'stuck to bottom' thing that would help keeping the jump module in the direction that allows to jump always. I understand the design is related to 'right calculation' BUT I am still able to change the module position - even in the worst situation, just it will be painful and time consuming.
No other downsides really besides those two! :)