Charge It is built around a power meter: you hold to charge and release to act, and the level is designed so that only a narrow band of power gets the result you want. Too little falls short, too much overshoots.
It's a pure timing game, which makes it easy to pick up and surprisingly demanding once the target window narrows in later levels.
Holding fills it at a constant rate and releasing acts at whatever level it has reached. Each level has a target band, so the skill is releasing at the right moment rather than as fast or as hard as possible.
The levels themselves aren't on a clock — the timing that matters is within each charge.
Yes — tap and hold, then release. Nothing to install.