Great entry with lots of polish. I also appreciate the “Continue” option, as I don’t have to restart the whole run when I die.
When I was backed into a wall, me or my pets would be killed from behind. Adding a warning indicator before enemies appear on screen could help with that, at least it would feel more like “my fault” if I die, and not just a “coincident”.
The achievements are a great way to let me explore the game for replay-ability as well as the high-score. Good job on this one.
If you plan on working more on the game, it could be cool with some more weapons and upgrades for each floor. maybe a laser, machine gun, granade launcher, etc.