Firstly, please use descriptions about your link before posting. I had no idea what the link was and most people won't click.
The site contains way too much marketing for a puzzle game, especially to make a account. The main menus are extremely confusing, and mostly all market making a account. To make it worse, a single wrong click can lock the site up, trap you in account creation, or wipe progress. There are also 3 different ways you market this account, including "ads" and alerts that show a blank screen, wiping guest progress.
At the very least, remove the notification bell, the extra step for guest creation, and the ad after the first puzzle. Also add device saving, and basic stats. There should be no in-game ads for account creation.
For puzzles, the first puzzle is difficult to start. However, most of the following puzzles use the same mechanics over and over, breaking user engagement. I personally left after the 4th puzzle, due to a account request that resulted in a empty page. The tutorial is also too long.
Some suggestions to get people to make accounts are:
Extra in-game currency.
Showing that you can access save data from multiple devices.
Having just 1 area that shows account benefits and a proper login screen.
I played all of this on mobile.
Feedback Exhange.
I have a sokoban puzzle game, playable in the browser.