Yes, the game has glitches. Many involve trivial things such as getting stuck in the ground or teleporting or other map-breaking type things. Some on the other hand cando 'useful' things in the missions used by Spark Wars, i.e. exploits, to use traditional gaming terminology. As with all exploits, some consider such glitches to be an unfair advantage whereas others consider them as utilising something that is in the game. I'll let you decide.

Also, some have acknowledged the possibility of using an AR card (Action Replay, a hacking/cheat device) to cheat their way to the top.

Glitch #1

Before the "Press A to accept" screen appears at the start of the mission, hit the touch screen where the map button is, i.e. on the left. Then unpause it, and it goes back to the "Press A to accept" screen except you are able to fire your guns, turn in place, walk in place, jump a height of nothing off the ground, even transform, all without starting the mission (timer included, where applicable.) On missions where shooting things gains you points, you can even do that and build your score before the timer begins.

Glitch #2

Go to Tranquility and start in the Junkyard. Turn around, jump over the fence, and stop when you reach the buildings in front of you. You should see a Gas Station that is on a raised platform. Go around to the side of the block that is facing the area with the factories. You should see a pair of buildings, one shorter than the other, with a crack in between that you can't squeeze through. Jump on top of the shorter building, and go right to the back, where there is yet another, taller, building. Go to the corner where all three meet and walk into it. If you keep walking, you should fall into the crack. Turn left. You should see a black patch in the wall of the big building. Walk towards the wall at such an angle that you are pushing against it but still moving forward. You will go inside the large building.

Glitch #3

Well, not even sure if this counts as a glitch, but anyway. Transforming to robot mode, if you hit thefire button (Y) it jumps straight to the targeting stance. And transforming to a car, if you hit the speed boost (R) it activates it right away and so jumps right into being a car. Transforming to a helicopter, thestrafe and ascend controls (L, R, and A) work while the transformation animation is still going. With the first two, it can't handle doing those and keeping the animation so it just skips the remaining animation.