I really dig the additions of the challenge room, but like others said I would like if the abilties like throwing and teleporting would be a bit more snappy, especially considering the design of the challenge rooms that require quick reactions.

I'm putting it on my mantel!

The added challenges in the rooms are a great addition. For the final teleport challenge with the stone tiles room, I think you should have gone a little wider with your camera. I had to purposefully die a few times just to wrap my head around the layout so I could better navigate the space.

But overall, I like all the new additions and that tense boss theme with the cannons is excellent. One little oddity in the slime room is that when these fellas jumped, they would go behind the banner with the mouse directions. I'm not sure if that was intentional. I do also wish my shuriken went through the slimes and destroyed them, that way I could still teleport to it after, or there were times when I thought I was awesome for lining up a double kill with one shot, but my shuriken was destroyed upon impact.

Overall. Great work. I really liked your entry this round.

This did keep me engaged, although there are a few things that make it feel quite unfair. For instance, the super small camera size and slow camera speed. Because of that, I had to replay each part of the crystal room multiple times just to know how that part looked like. Not to mention that when I teleported somewhere, I was basically shooting blindly because the camera was still waiting where I was previously. This is luckily fixed in the cannonball level, which I think was my favorite, although even there the shuriken teleportation felt sluggish to me for some reason (maybe there was a delay between when you could shoot and when you could teleport?) In the end, it was only really worth teleporting when it was absolutely necessary.