These monsters freak me out in the same way Creepers in Minecraft freak me out. They look so alien and they just come at you relentlessly. Uhhgggg. Fun game.
Holy...
I made it all the way up to Jupiter again, got a boost from star sliding, flew nose down into the water, then hit a booser straight into the ground, then I got stuck :P
Reguardless of the original difficulty you pick once it caps out at about as hard as it gets you should make them start gradually speeding up.
Either that or in your next version make larger words :P.
Like a Boss wave with 6-10 letter words. lol.