Needs audio feedback for hit braziers. (Currently one has to leave the purple platform to check the full bounce sequence, making it much harder to get the angles needed for hitting multiple braziers than should be neccessary.)
Maze lacks a heading marker, rendering a critical puzzle unsolveable by proper means. (closest thing the maze has is an unaligned rendering of a compass)
Needs mouse lock. (clicking currently does nothing, due to what I suspect is a mismatch between what the crosshair is pointed at and what the mouse cursor is pointed at.)
While the blocks can all be placed… except for the switch block, none of them seem to work. (Might be a good idea to include a basic overview of how blocks are supposed to interact so that, at least, a rudementary understanding of what is going wrong can be obtained.)
There are many spots where (due to having had to turn the 3D view) it's hard to judge what is in front/behind you instead of to the side. (may help to include either a preview switch or a reset 3D view mechanism.)