I think the game is really good. I love the frontend design as its easy to navigate. One thing i love about the frontend is how the avater moves to any gameplay mode you choose. You did a fantastic job here. I only played the zombie mode, so, the suggestions i would give is based on the zombie mode.

• I think it would be good if the player be able to move around - dodging attacks from the mage zombies while returning fire
• Sounds would also be nice. (Edit- Sounds as in, better gun sounds, zombie sounds and action or tense sounds to make it even more scarier and give that adrenaline rush while playing)
• This suggestion may be too early, but then, i think it would be good if there is a multiplayer option, where players compete with each other on the most zombie killed during one game.

Overall, the game is really nice.