Bugs or glitches? It'll be quite a list...
1) I don't know if Pinkie is supposed to be a human or not; but anyway, his jumping is weird the way it is now.
You jump higher than a flea could even dream about; crossing more than a fifth of a screen with a mere tap on an arrow key (and if you forget how to release it, you could most likely hover up to Neverland). It is hard to aim your jumps correctly.
If you want an inspiration for really good platformer movement animations, watch any of the "Prince of Persia 1989" gameplay videos on YouTube.
2) I think there has to be a more sophisticated way to display text. The same applies to the restart button.
3) Another animation while moving is a good idea, but overall height of the main character shouldn't change. And Pinkie looks like he's sliding, not walking.
4) I am able to leave the screen, touch the greenie. But more importantly - when I do it, I still get to the next level (!). The lives (only displayed in the second level, don't matter at all).
5) It is not made clear in the instructions that we have to go up. A door or so could be better maybe.
6) Shift to jump... I can almost feel the pain of Windows XP users, when a Sticky Keys notice appears every time they jump five times. Why don't you use just the up arrow key?
7) Spending more time for graphical development (Pinkie, background, tiles...) *will* get you more players. If it looks like this, somebody may close your game just when it loads.
I know this is just a test (really!) so don't worry about the bad rating. But it's your first game (congratulations :P), something you will surely remember, so try to make it as good as you can. The biggest problem so far is in the movement.
Good luck with v. 2. ;)