Photoelectric Effect

Short prototype about emitting photons to trigger all switches (that's why the game is called photoelectric effect).
If you are tired of the tedious shuffling in Sokoban and prefer to focus more on planning, this game might be a good fit for you.
Made for Thinky Puzzle Game Jam 6, inspired by Chromatron and my earlier game Quantum Mirrorcle

Controls:
Z to undo, R to reset
Esc to level select
Click the message screen or X or space to continue

Planning phase
Click to select and place tools
Right click or click rotate icon to rotate mirrors, dopplers and splitters
Click play icon to run a test
Click turtle / rabbit icon to change photon's speed (you can also change it in testing phase, but that setting will not be saved when returning to planning phase)

Testing phase
Click emitters to emit photons (emitters can be used multiple times)
Click stop icon to return to planning phase

Additive color theory:
Red + Green = Yellow, Red + Blue = Magenta, Green + Blue = Cyan
Red + Green + Blue = White

Playtester: Tetramouse