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.
You right, then it cant work with play from begin.
I dont thinked in touch...
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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)