The opening text was really long, which you've heard plenty of. But it was mostly that it was hard to scroll. The text was king of small and whatever was generating the window, my mousewheel did it a half line at a time. Which was infuriating.
It needed some on screen text to tell me what to do. I skipped over the controls the first time through and a prompt on how to charge would have been great.
Apart from that, this has been my favourite LD game by far. I loved playing it.
Annoyances: character moves too slowly, it definitely needed to be sped up a little. The hit box felt off and I got snagged on rocks a few times. Aiming the drill was a huge nightmare and I had to reshuffle myself every time. Tossing the crystals was so much fun, but a few times they got caught in the top of the tube and I needed to get a second one to dislodge it. Teleporter should have let me walk into it, jumping there felt weird. And the crystals didnt stand out enough. They were never hard to find (nothing else was the same size), I just felt they should have been coloured differently.
All in all, this was amazingly well done. You've hit something great with the UI on the drill and the recharging mechanic. There was a lot of variety in how you played.
You should absolutely continue this, it was top notch game design.