I updated the demo with a few new improvements and fixes.

• Most of the guns can be reloaded before the ammo is zero (but you waste the reminding ammo in the clip-based guns)
• Improved the look of the game menu
• Replaced the last two levels with a new one with a very powerful gun, but you might need to re-install the game and not just update it

That's it. Have a look. Feedback and gameplay videos on Youtube, Vimeo, or other platforms are welcome.