Hey,
The game took forever to load, but probably because it's in the browser.
First thing that I noticed when selecting a character is the "random" text below the character, remove it, just have a character with "?" and change it's name to random. I personally think that character name should be under the character, not above.
I won't comment the visuals, it's clear they are not that great. But I get the vibe.
Wording. When levelling up, you have options like "Fragments plus", "Healing plus". Just do "Fragments", "Healing", and on hover it explains it clearly. I would probably also change "Gather radius" to "Loot radius", or just "Radius". You currently have to press the + button to level up. You should probably make the whole skill thing a button and remove the +.
The character moves very slow. I got bored very very quickly. I was supposed to go somewhere, but I just couldn't be bothered.
UI was quite confusing. In pause menu you have a navigation on the left and on the bottom. These are not best UX practices.
Being a bit harsh, but realistic. Hopefully this information helps.
Best of luck,
Remi