Time Shatter

Time only moves when you do. Stand still and the room holds its breath — bullets hang in the air, glass stops halfway through falling, and you have as long as you like to work out the shot. Move, and all of it resumes at once.

It runs in a browser tab, on a phone or a laptop. Nothing to install, no account to make: the link is the game. Forty-one unlocks sit behind the title screen.