Spent a pretty long time on this one, and it seems I'm stuck on one remaining alien, or possibly a remaining shard, if you need all portals to be active to get out of here...
It's good to see you're back to making these games again, with medals no less, though unfortunately they don't seem to work. None has unlocked thus far and the game's almost over - which gives little incentive to complete.
Also unfortunately don't feel the group dynamic makes this better.
The intent's good, it's nice with multiple characters and story, but it makes it more so tiresome to get through this than it makes it fun IMHO. It doesn't make the puzzles more difficult, it just makes it more time-consuming to go through them all, having to switch characters when you reach different ones.
In addition to that the group dynamic doesn't always make sense, like how Sonya is able to pick the weight, even though you need one of the guys to use the crowbar.
It also seems unrealistic you'd have to find clues to try combinations - , for example, and not just go for a gamble if that's what you'd prefer to do. Freedoms both with character and order of events would make this not just more realistic but less frustrating. Alternatively: a character selection menu you can access directly via the menu - not a room you have to retrace your steps to each time. The alien's a nice touch though, he does add something special to it all, even if the portals don't speed up movement all that much.
I did like the game, and the amount of effort that went into it, definitely seems more than usual, but not sure multiple characters is a good direction to take it all. Feels frustrating not being able to focus entirely on the experience itself, and the puzzles.
Hope you can get those medals working too.
-cd-