I ran into an interesting bug in Survivor. If you die while activating a timed powerup and quickly restart the game, the powerup will persist.
If done with a shield, the shield will start at 20s when the game starts. This isn't super useful since the first 20s of the game are the slowest, but still
The more interesting one is if you can manage to restart the game before an Explosion ends. If you do this, there will be an infinite explosion that clears the entire screen forever. This can't be used to get a top score though -- around the 100 point mark, you will be flying so fast that the shrapnel from exploding crystals will end your game.
Also, this will persist forever, even across games, until you reload the page or pick up the first item you see while the effect is occurring.
If you're not going for a top score but just looking for the 4x 2,000 IP, this glitch would make doing so trivial