I will consider refining the design after I identified all fundamental flaws. Otherwise I end up maxing out something maybe rotten to the core.

Hmm... I didn't think about using no gel or no bridge, maybe I'll try it yet. But I didn't use button switching off grid. Interesting level, requires cleverness and a bit skills.
However, once again, I must complain about design. In spite of appearances, design is very important part of level project. Every chamber becomes much more pleasant if it's reasonably planned. Size and distance between subsequent objects in the level is as important as illuminating. I sincerely recommend putting more work on design.