You should be able to build walk in and fall in teleporters. Walk in you need to enter from a side, fall in you come in from above or below. This way we could have it so you have two top tier teleporters, and just jump down and WHEEEEEEEEEEEEEEE! Then if you built it right you land safely.
I like this teleporters idea, it really annoyed me in Terraria when i had to walk for like 30 mins avoiding monsters to find an ocean biome etc. But you guys took mistook portals for teleporters. It should work as in fantasy game(there was this Blink ability in Warcraft3 or Amalur), of course working on science not magic. No gates, no portals. You just appear in another place/building/planet.
It might be good idea teleports needed to travel faster to point A to point B but what if you will place 3 teleports there has to be a menu that letting you decide witch teleport to use
If they were to make that though it would have to be quite hard to make - or else mining and stuff will just be way to easy :/ You could go into a good mine just by teleporting.
This is what they need in Terraria, so when you get lost underground you dont have to kill yourself to get home
but if you used the stargate, wouldn't you be leaving your ship on the planet you left from? It would be cool if you had to call it and it would take time to get to the planet you are on
Included but at a high high high cost. In terms of energy per jump and resources to build in the first place.