I taste colors now. Fun in multiple ways!
All kidding aside, this has a cool gameplay loop. Interesting to see what kinds of aliens are in each dimension, and what kinds of beasts you're able to assemble!
Some small notes; most of the sprites look fine, but I think the player character and the beast are under some scaling effect, and as a result are a bit artifacted. Setting the pixel clamping on your SpriteBatch.Begin() might help deter this. There's also a bit of weirdness with the shot particles when transitioning between levels, likely just some missed behavior during state change.
Overall, I like it! Keep up the good work.