No idea why this is so highly rated, it's unfocused, unpolished and buggy,
I fairly consistently managed to spawn 3 portals. Level 3 feels more like a bug than a feature.
The art and lack of animation is just dull.
Plenty of levels like level 4 felt like padding, and of the levels that felt like actual levels, all of them were easy exercises in following a linear path.
All the excess elements in levels rob the feeling of everything coming together.
The continuous music gets obnoxious.
I usually try to be nice even to games that are fairly awful and find something of value the dev clearly did well, but this just feels like a complete lack of effort, shame when the core concept was promising.