Hey Danidre! Here's a nice long review for ya!
Disclaimer: I didn't beat level 5, haha.
Overall I think it's a pretty nice fan game! It's definitely a rage game, that's for sure, and the design is not too bad.
But there are some huge issues that you should consider addressing.
First off, and most critical, is the collision. You have to be a bit more conservative with how big the hit boxes are on things. When using box collision with circles, you need to make the hit box smaller or else there will be a lot of false collisions (it's very important for a game like this, haha).
Another thing with the collision is how you handle walls. Snubby was nice enough to allow the player box to "snap" to a wall if it's "close enough." which obviously is helpful in situations where you're trying to be quick.
Patterns... you did very well with patterns in levels 3 and 4. But in level 2 particularly, you have 4 circles moving around in a pattern that is very hard to memorize, let alone track (since they all have different loop timing, so they swap around and stuff). You don't have this issue in later levels, but it's super annoying to address in level 2. It's more about brute forcing it and hoping to get lucky that the phases are in your favor, which is a really bad design.
That one in level 5 that travels around the block is okay, but still not really consistent with the rest of the game.
Levels 3 and 4 are much easier than 2 (probably because of the above reason). That could be nice to give the player a break, but it might be more reasonable to ramp the difficulty as normal. I mean it's hard enough as is, right? xD
Score boards don't work. That's a shame because it would be really cool to see some competition. Medals would be really cool too because it adds pressure on the player to beat the levels.
http://i.imgur.com/Rt4H5NZ.png
There's a typo and clearly an issue with the text box values. You might want to thoroughly test for small things like that before you release ;)
Anyway, besides all of that, the game is neat! The reason I rage quit on level 5 is because the collision was just getting too annoying. I would have liked to see how the game ended :D!
I did NOT in fact have lag though, so that's good! I hope you can fix that for other people since it seems to stop them from enjoying it.
Overall 5/10! :D