I enjoyed it. While I'll agree it "feels" a little slow, if it were too much faster, it would be a lot more difficult to kill more enemies. I liked the eyeballs for multiball, though upgrades for multiballs would have been nice.
You should be able to one shot (instead of two shot) the early bears, the red one with the picnic basket and the blue one with the sub. If not, give it one or two more levels.
A couple things:
Spent health packs stay in your inventory after they've been used and can be sold for mints.
I finished a stage, and when it was showing me the "Stage Completed" window, an enemy still attacked me and made me use a heal pack.
It would be nice to be able to use health packs manually.
In the buy window, when you click the ? button next to ammunition, it says "Hover items with mouse to see their name and cost" but you cannot see the cost when you hover.
The popup window about it being a demo appears WAY to frequently. It's mostly frustrating when you are being attacked and it pops up since you need to use the mouse to close the window so your aim ends up off.
If you are stuck and unable to progress to the right, simply put yourself up against the object you want to move through, hit X to put your pet down, then hit X again to pick him up. In the process of picking him up, you take a step forward. Do this a few times and you'll pass right through the object.
 "Ryona Zombits"){kind=icon}
 "Queen's Quests"){kind=icon}
 "Bitcoin Miner"){kind=icon}
 "Marty"){kind=icon}
 "Atomic Escape"){kind=icon}
 "The Everloom"){kind=icon}
 "Teddy Bear Picnic Massacre"){kind=icon}
 "Mummy Mojo"){kind=icon}
 "Oberon"){kind=icon}
 "Frontline Defenders"){kind=icon}
 "Escape Machines beta"){kind=icon}
 "Princess Defencess"){kind=icon}
 "Path of Hercules"){kind=icon}
 "Nelly 2: ep.1"){kind=icon}
 "Greed For Coins"){kind=icon}
 "Notebook Space Wars"){kind=icon}
Click on the coin icon, it will switch to pumpkins. I added this info to the game instructions, thanks! :)