Great job, since I have a lot to say I'll try to be brief
Starting with the Itch.io page, which is good, but can be improved. Your game works well with GIFs, so I recommend that you introduce at least one in your screenshots. Also, the look of the page would improve with a large logo and background, like in these other games:
https://ko-op.itch.io/dep-nocturne
https://terrycavanagh.itch.io/dicey-dungeons
Unfortunately, the game font is really difficult to read, perhaps due to the size of the window. And this causes problems in understanding the help panel, mainly due to the difficulty of recognizing the controls compared to the rest of the text. I recommend using a different colour or font to highlight them. Nice idea to insert links to social media in the credits.
The text you use to explain the game is perhaps too long and sometimes redundant. You could try reducing it, like in this attempt I made:
"Catch as many gemstones as you can, each one missed will reduce your health. Good luck."
As the game is built for PC, it would be a nice addition to be able to return to the menu using the ESC (from panels such as help and credits), rather than having to click the 'back' button.
Following long-established practices, the button to close the game should be coloured red. Also, its icon is too similar to that of the credits, I recommend changing one of the two.
Nice custom intro, with the game logo.
Adding options to change the sounds or increase the window size would improve the gaming experience.
I recommend creating a button for the resume in-game.
If you apply any of my suggestions, remember to update the Itch.io page.
That's it, thanks for sharing your game with the community and good luck.