That was nice. Here's my feedback!
I liked the art. The animations were nice too. I wondered if the player could attack or not since he has what I guess is a wrench in their hand.
The upgrades were standard, but the level design made them stand out. There was a couple of tight jumps that made you glad you had them.
Here's some things that could be improved:
There's a lot of space between the moving platforms, you can't always see where each one is going, which makes you need to test it out by yourself, which leads to unfortunate deaths.
I don't know if it's an input thing or not, but text boxes, such as the "It's too heavy..." stays there for way too long. I have the time to read the text at least 10 times before it disappear. Although like I said, I don't know if I was supposed to press anything for it to go away.
I noticed on your page you were wondering if controller input worked: it does! I played with my controller. Only thing I noticed about it is the level on the top right of the map if I remember correctly. I couldn't pull it, either by pressing any buttons on my controller neither by pressing the X key on my keyboard.
Overall, it was very enjoyable. A nice mix of platformer and metroidvania.