What an amazing idea and presentation! It would be cool if the boss was more balanced though; it's easy to spam anvils and make it impossible for you to win on the player phase. Maybe a cooldown for the anvils and grenades? Maybe the time the player has to survive is related to how many attacks the boss used?

That was  fun idea, I'd love to see more of it.

Really fun idea for multiplayer game, where players take turns and constantly switch roles.

In this format though there is a problem in game design, player kinda has conflicting goals:
In the boss phase to complicate and trick hero, but in the hero phase player wants simple and clear pattern to avoid.
In the end: player wants to kill hero in simplest way possible, to evade then in the simplest way possible. And this isn't fun.
If player decides to complicate game situation game works wonderful (this was my first try), but if player wants to win game breaks and becomes boring (and this happened on the second try).

Example of winning : first round player shoots from middle right, then in the evade round player moves in the bottom right corner. Then in the boss round player shoots at the right corner etc. See how boring it is? (also you have almost no reason to use abilities if you play to win)
Random actions at the start of the round help with this, but problem is still here . And i really don't know how to solve it without multiplayer. With second player there is real reason to complicate situation for hero, and game shines.

But anyway, very good work, with art and audio too, but background music would be great addition. And the sound of the start click is slightly shifted to the left.

Really, like the game, I think it makes for a fun multiplayer game as well!

Plays like a level builder where you have to get the difficulty just right, neat idea! I think the variety of attacks is just right, there's enough variety without being too confusing or overwhelming. I did encounter an issue where the player spawned in the upper left corner during my boss phase, I had to shoot a bullet in the corner for the player to return to the game area. Other than that, the game runs well and I don't have any other issues in terms of gameplay. Great take on the theme, nice work!

I legitimately went "Oh wow" when the second round began and I figured out what was going on. Kudos on such a good job! Now that's what I like to see when I hear "roles reversed". 

This took the role reversal concept to a whole new level, Great job. Loved how you basically had to fight yourself.