Thanks for giving my game a try and the feedback! 

I do want to add more sounds, like background music/ambiance and swimming effects but it's hard to find something suitable in a short time. Since RPGMaker's pre-made sound assets don't have anything that fits, I'm very rush in making this game.

I think I can make the movement more smooth and add some more leniency for input if I have more time, I don't think it's RPG Maker false since RPG Maker does allow you to change most of the thing by js.

Oh ya, if you are interested to see more interesting usage of RPG Maker , check out my first game jam game: 

https://catesgamedev.itch.io/rpgmaker-maker

It's my proudest creation so far since I join that game jam using all premade assets, I have more time doing the mechanical/program eventing part of the game engine.

Thanks for giving my game a try and the feedback!

I agree that my game is overly simple, I plan to make a more complex underwater area and add some enemies (like jellyfish that will stunt you for a second, and fish that will attack you/ push you backward), I overly underestimate the time to make the pixel art with my skill, it somehow took me 24 hours just to make the arts currently in game, and when I realized it, I just decide to just make a very simple game with winning and losing condition, then called it a day. XD

Thanks for giving my game a try and the feedback!

Glad you like the game!

Thanks for giving my game a try and a nice feedback! 

I do not plan to let the ground/maps be like this, but I spent almost 24 hours just doing the art for characters, seaweeds, and bubbles.

I have only weekends two days to create the game, so the only thing I can do is just quickly add some gameplay in the last 24 hours, deciding to just give some blurry shape for the ground.