The "water makes you go faster" mechanic was intuitive and I figured it out just from walking over it after killing an enemy. Design of the MC and the sound effects are great. Voice acting was good to include. This is a great start to a full game you could sell for money. Add voice acted cut scenes and refine the models and you've got a solid start here.

Main areas that need refining are the hit boxes and camera.

The water sliding was a nice touch. Nice amount of levels in this one, allowed me to get in a good amount of playtime to home in on the controls and my water sliding/jumping skills. The camera clipping through walls and some tricky spots to clean up having to realign my character to make sure it registered were about the only things i noticed that kinda interrupted the fun flow, but not even that much cause the game was fun. I enjoyed it!

Awesome! Being able to slip forwards on your own water reminds me a lot of Splatoon! I also really love how the enemies have old Hannah Barbara sound effects when they die. The movement doesn't seem to be normalized when moving diagonally (you go about 41% faster when doing so), so it took me a bit to even realize the slipping mechanic existed because I was just making those jumps with strafes! The aiming seems a bit misaligned, too. I had lots of fun exploring the area, which is pretty well modeled! Great work!

I'm no't a critic, but you can see trough walls and music disappears after first level. But game it self is solid.