But thats the thing, it actually has a surprising amount of depth if you try to break highscores, since every level is basically its own puzzle where you need to try maximizing the amount of points you can get from it. (although it took me 3-4 hours to get how the game was meant to be played) And I am fairly well known on GAF for raving about games, usually about good ones. And Surge IS good, it definitely has problems though. I can see how people say " its a fun, unique puzzle game. really loved the mechanics. i did spend time trying to beat some scores... it just didnt captivate me enough..". Thats fine of course. But its in no way a bad game.
The thing is, I actually agree with you on the "captivating" issue. It definitely fails getting people hooked right from the start, plus a few other issues. But if they work on that + new modes for a full release, this game could be really, really good.
As it stands, its a very fun puzzle game with satisfying mechanics that fails a bit on the diverse content side, hurting its reception.