I don't quite understand how the game works. I mean, I know it plays like the Mario arcade game, but the health aspect alludes me. Why does a level reset after my health drop to one heart rather than zero, and why do I sometimes start with two? And why do I sometimes explode into blood after I hit a spiked slime from below? I know the cause of that isn't the timer running out, which, by the way, is an annoying, useless feature. What need is there for enemies to respawn at the top if you likely won't even have enough time to go after them?
I can't remember whether this was in the original Space Invaders or not, but if it was, I find it as a fault nonetheless; I find it extremely annoying how I have to break through my own green shield thingies first before being able to easily attack the enemies. Sometimes after a level restarts, the shield and my health restart, and sometimes all the damage is carried over and I'm left with one heart. More often than enough, I restart on an older level.
This game was just annoying. It tried to copy the great, unique mechanics of bit.Trip Runner and created many flaws of its own. Many times I died after jumping over a spike even though I clearly landed one or two tiles in front of it. Controls are annoying since bit.Trip Runner is a game where you have to think quick and be able to switch between actions quickly. This didn't work well here where you would maintain in a bullet form after pressing down to duck. This isn't much of a glitch as it is poor game design. "You win" medal didn't register after I got sent to jail, and my anger and frustration, as a result, brought what would be a 3.5 stars to 2.5.