As I work with image sequences a lot I use animate frequently to view these, an amazing tool. Fast, simple and snappy, just what I like.
I do however miss a Play keyboard shortcut.
After I've stopped playback to step forward/backward I need to click the sequence and click Play in the menu to start playback again. Cumbersome. Work would be much easier if I could just press a key to start playback again.
I would suggest p for Play.
While we´re at it, I think it would be a little bit easier to work with forward arrow/backward arrow or ,/. instead of spacebar/backspace to step through the sequences.