Clickteam Fusion 2.5: Standard
This is your canvas. The Frame Editor allows you to drag and drop instances of objects onto a level. You can create "Backdrops" (static scenery) that don't slow down performance, or "Actives" (moving objects with animations). The layer system supports parallax scrolling, allowing you to create deep, pseudo-3D backgrounds for your 2D side-scrollers.
In Fusion, you create three events: