I really like the look of the game, and I like the sounds, you're really capturing the pacman feel really well. I think getting past the laggyness at the beginning of the game would really make the game shine. I presume that the blue pellets are the issue, since the more there are of them the laggier it is. Maybe they are all doing some heavy or inefficient computations? I was able to put the laggyness aside and get to level 4! The buggy screen effects are a nice touch, although I would tone them down a bit. Some of them are quite extreme!
I think this game has a lot of potential if you were to polish it a little more! Nicely done!