OOOO, this was REALLY well made!
i LOVED the portal visuals and the mechanic
I think you could better introduce the mechanic, but from what i gathered, the portals with empty podiums are disabled and need the diamond thing to be activated and usable
Then you just need to identify and activate the portal that will take you to the red ball
It was pretty self explanatory, but what WAS confusing is stuff like what the diamond pillars that popped in and out of the floor meant (now ig i know, they just show that this portal is activated)
But i love the idea!
I wanna ask for more puzzles, but i do see you worked on this alone and i cant imagine how you did that xD
But i would def wanna try this later if you added more stuff, levels and polished the visuals up just a bit more
Oh and also audio, idk if there was any, but i couldnt hear anything so ima assume that there is no audio for now
But this could really work well if you worked on the game some more :)
Overall, GREAT JOB!
And also, making it all from scratch? Thats just even more respect!
Keep it up!