Well, went and checked it out.

Sorry for the shitty cellphone shots.
First off, shot is more powerful than the loc test version and there are more rings and bullets in general. Item counter activation is still at 1000. There is a new stage called Ruins. After that...the game ends! Yes, only four levels, wow! Talking to other people there it seemed obvious that more levels would be unlocked by something since there is a whole other part of the geography you can't go to yet. There is also the shemale character and Casper that are not yet usable. Not sure how the new stuff will be unlocked.
The new stage is a haunted mansion which has zombies, banshees, library cases and giant hands attacking you. The giant hands give big rings if you're powered up. So do the rocks in the upward scrolling level. I wanted to test out if locking onto the rocks would give you a recharge since it drops your item counter really fast and you get a ton of big rings from the rocks. But a lot of people showed up after my turn was up.
Oh and incidentally, the second time I played this happened:


All I did was power up on the second boss during his second pattern and after I beat his first form, he got locked into position and stopped taking damage. He eventually scrolled off the screen to the left and the game was just stuck in a bossless boss battle. Attendant had to reset the game and everything.
Pretty sure that guarantees a board update.