Thanks for the feedback! A few things:
- Currently, if you exit a level there is not a way to save the level state. But this feature is on our to-do list!
- With T, make sure the L's are completely upside down, with one mirrored, before you try to merge them into T (rotate 2x, or shift click a reflector to make it a vertical reflector)
- We also plan to have it remember your full screen selection on startup
Thanks for playing - we are working on a lot of improvements as we speak, and your feedback is helpful!