You know what
This game is great. I like it, but what's needs is:
1. Adding melee weapons upgrade. (The same with the firearm weapons).
(Optional) And if the there's a shotgun that would be great.
2. Adding a boss fight like a giant enemy slime.
3. Adding side quests to earn money alternatively, rather than opening box.
4. Expanding the skills mechanic like: (increasing damage attack, evasion, and defense for the player).
And finally.
5. Adding friend or an ally that benefits in battle mechanic.
I know it's a prototype and all. But I'm sure you can do it right.
Overall, the game was great. (8/10)
I'm looking forward to it.