I love the steering, it's not like most games where you move one square to the side every time you press left, etc. I think the cubes you pick up for points should be larger though, as many times I only noticed them at the last minute (Mostly purple next to the red spikes). Other than that it's good, 4/5.
'Twas a fun game, I liked the simple art work, but as people have been saying, it takes too long to grow large enough to eat the gray (2nd) dogs. Also I'd advise changing the collision so you have to touch them, not go too close to them.
Nice graphics, I love the death animations, however I find the enemies increasingly frustrating, as any game in which you can be stun locked by NPC's really needs to have some serious thinking applied to it. The swordsmen alone are a challenge if you don't suddenly instant kill them somehow. (Which seems to happen randomly.)