Reduce flickering with SimpleButton that only has an upState.
Reduce flickering with SimpleButton that only has an upState.

Gama11/openfl,NenadBojkovski/openfl,Gama11/openfl,openfl/openfl,Gama11/openfl,Gama11/openfl,openfl/openfl,openfl/openfl,NenadBojkovski/openfl