Mouse - drag the points around the screen. Space - capture a frame of animation. ⇅ Arrows - change the speed for the frame Menu Arrow - Access the passive items you can place on the stage. WASD - Move the entire blue figure. UHJK - Move the entire pink figure. Play Button - Play your animation! (2+ frames required) Text - 1st row shows the number of frames, 2nd the speed for that frame. A cool little feature of this is that you can give each frame its own speed, so you can have rapid movement mixed with slow without making more frames.
(I added a Recorded thing... and I changed the floor color.