Update: Had to install the 64-bit version of Vivaldi in order to play this game, which is very weird because I never had this problem before. But I don't mind because I honestly thought that I already had the 64-bit version.
I really like this game, haven't played in a couple of days though and now I'm getting the following error when trying to start the game:
"The browser could not allocate enough memory for the WebGL content. If you are the developer of this content, try allocating less memory to your WebGL build in the WebGL player settings."
Browser: Vivaldi 2.4.1488.35 (Stable channel) (32-bit)
OS: Windows 10 1809
OS Build 17763.379
RAM Total: 32 GB
RAM currently used: 9,6 GB (so still 21,7 GB available)
 "Idle Harvest"){kind=icon}
 "This is the Only Level"){kind=icon}
 "Gravitee 2"){kind=icon}