Y, a click works on tick, but you dont click at tick.
Yes, a "On click", fires once ... but reads the state every tick checking if its clicked.
The "Is in touch" fires all subsequent events every tick though.
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You right, then it cant work with play from begin.
I dont thinked in touch...
some additional info:
and here how to fix the still standing sprite after letting go of touch:
(make another Is in touch, right click it to invert, then add those 4 things)