What I liked:
- Surprisingly good mood
- Graphics (save for the walls)

What would make me like this game even more:
- A restart button
- More dense distribution of energy powerups (so I can play longer)
- One zip so I can just download the game
- Some ambient sound / music
- Game sounds (like picking up the powerups)

The linked download page will only download the exe without the data folder. Without that folder, Unity won't start. Whoops!

I'm not sure I get how the Egyptian hieroglyphics relate to you getting power back for your shoot tank thingy. That aside, there's some glaringly easy to fix issues, mainly related to how the walls intersect and the floor doesn't properly line up on the east side. With some more variety thrown in and some satisfying effects when you land a hit, this game could have been improved significantly.

Nice game, reminiscent of the tanks game on Wii Play. Horde survival is fun, and some of the features you've included are very impressive. Namely enemy shooting and movement AI - those are not easy to implement. Likewise, making it cost energy to shoot was a smart design choice.

Things to improve outside the game:
Make the download be a single pre-zipped file
Upload some gameplay screenshots to the game's page on this site!
Add a description for the game on this site

Things to improve inside the game:
Add restart/exit buttons
Make the energy meter more prominent (possibly a bar?)
Make WASD work in addition to arrows
Add visual/audio cues so the player can tell when they get damaged/powerups/kills

Thank you to everyone who commented and thanks for the constructive feedback