i already created all animations and sprites but the events and conditions are lacking from the online tutorials. anyone show me a link. i needed events on ; collisions, mid-air, rush melee. need link pls
I think there is no link, I have no knowledge of any tutorial about a platformer melee combat system, sorry 
You will have to create those event, check in the forum, there is a lot of topics about “state machine”, which is the approach you need here:
State “walking”: if attack pressed → normal attack, if jump pressed → normal jump
State “running”: if attack pressed → slash, if jump pressed → low jump but high distance
State “jumping”: If attack pressed → jumping attack, If jump pressed → double jump
etc.