Overall, an interesting idle game that can be beat in a reasonable amount of time. Offline gains are an absolute must. However, there are a lot of "traps" that will waste your time and money which I am listing here as advice to players and feedback to the developer:

-Late game upgrades are extremely expensive to the point they just work as padding.
-Aluminium is a trap, mostly used to throttle advancement. You are better off maxxing out its upgrades and the iron tab and leaving it alone.
-Most of the Engineer Upgrades past 9 are pointless. You are better off maxing out water, harvesting trillions and then sacrificing it in the Black Hole tab for a serious speed boost.
-Don't invest in maxing out the Titanium tab. Getting 300 titanium scavenging drones is good enough.
-The Prestigium tab is extremely useful. Once you get it, you can safely stop investing in other tabs and just wait out to generate more Prestigium for the end game.
-Prestigium offline games are bugged. While you will get a notice that you "gained" it, they will not be added to your in-game amount. I suspect this was intentional by the developer to pad out game time.
-Finally, the end Island achievement is an absolute slog. The additions you get are minute compare to the time and amount invested. Do not even try it until you have at least 500 Prestigium to finish it in one go.

While I would not replay this game as it lacks the depth of games like Dodecadragons, I think the dev is on a good track and will be keeping an eye out to see what he's working on next.

A very nice little idle/numbers game.
Not an incremental game, as you only play from the start to the end.
Not really a clicker, although that is important at the start, and to speed things up I did use a little mouse automation in the endgame.
But it's a pleasant, "What will unlock next? What should I upgrade next? Oh; I have to save up for that!" kind of game.
Don't expect years of game play (thankfully; I'm finding those a bit tiresome recently).
But solid entertainment if you like that sort of thing.

The game maintains the polished semblance of a deeper idle game, but doesn't particularly satisfy on any metric.

However, it's great value for the price.