Hmm, you put me in an awkward position. We were planning on simply having this environment ramp up in intensity toward the final room. (The game should really only take about 10 minutes to complete. Something of a proof of concept for us.)
But you throwing out the idea of other environments does tempt me to suggest increasing the scope!
By speed settings, are you referring to player speed, laser grid speed, or some overall speed scale? You raise an interesting point.
Also, if you'd like to try it out, we have builds of the current state of the game to test out: https://drive.google.com/drive/folders/1jsOXz3Isfp6CTGfL7PfKGCqF4xxdMJjV?usp=sharing
Any feedback is welcome, however incisive, scathing or negative. Positive is nice too, but we can't be too presumptuous :P