I used the newest SDK version 1.0.8 and was planning on implementing the leaderboards system that came with it so I left it for the last few hours expecting it to take "minutes not hours" to implement as mentioned on your site, but the SDK didn't allow me to assign background or icon image even though they weren't compressed as mentioned on Discord I used different import formats, mipmaps on and of and tweaked all values in vain, then I followed the video tutorials on your site and uploaded the images as base64 strings and made a project on the site successfully but couldn't use it with the SDK.
Then I tried the SDK posted by "theChief" on Discord but it didn't have a leaderboard example, so I tried mixing the SDKs by by importing the files that existed in 1.0.8 but not in the one by "theChief" and hopefully I get the leaderboard functionality from 1.0.8 without it's not working editor page that didn't allow me to upload background and icon images.
But the new version uses Hyplay.Core.Runtime while the older uses Hyplay.Runtime so I thought "Ok, they have changed the name in the new SDK, let's change it to 'using Hyplay.Runtime instead'." but Hyplay.Runtime didn't have all the functionality of the ".core" one and I ended up having a "missing definition error".
By the time I sorted things up I had less than 1 minute before the deadline and no build that uses Hyplay log in and no leaderboard, I managed to make that build 10-15 minutes past deadline :/
My plan was to implement it in an hour tops and use the extra time to polish the game's look.