I made a simple block character to practice animating using armatures. I made four animations - idle, walking, running and jumping. It was working fine, I saved it and then closed it. The next day when I opened my blend file, and pressed Alt + A, it plays the Jumping animation. I thought maybe it was stuck on that animation last time, so I changed the animation, but now all the animations play the Jumping animation only.
I don't know what's wrong. Maybe it's something simple that I missed out or maybe I hit some shortcut key or feature by mistake and can't remember what I may have done. I've attached my .blend file. Please check it out and help me fix it, thank you.