When I click the moves on the bottom left they do nothing, can not get passed level 2 :(
Yeah this happened to me. You have to click them, then click on another mech/object to use it. I suggest searching up a playthrough if you dont know what to do after a long time.
more often than not, there will be multiple ways those moves can be executed, so you also have to select what you want to use it on, and/or how.