Somehow, I get the feeling that this was made by the same person that made DWANG4M8. Both are basically levels inspired by Doom II PWADs, both throw Super Nailguns and Rocket Launchers all over the map, and both are highly symmetrical, though with items tending to fall out of the map on a restart.
This level, unlike the aforementioned DWANG4M8, has a Readme included that gives clear info to the developer as well as the inspiration. Though misspelled in the Readme, he does give credit to the original author, which allowed me to find the level and play the original version in Doom II.
This is a pretty accurate portrayal of PWAD telecross.wad. As implied by the title, this is intended to be the same level with the added element of Water. Of course, I get the feeling that the scale is also a lot smaller, the Doom level was quite spacious in comparison to this. The areas by the interior Teleporters have some walls with small, inaccessible gaps. These represent corridors in the Doom II version where Armor Bonuses would be held.
The Thunderbolt replaces the Double-Barrelled Shotgun at the middle of the map, the latter having been moved to a new alcove under the Water. Both have the problem of having no ammo, though at least the Doom example packs enough punch plus has enough ammo to start with. The original level also had a Slime pit that would trap and kill you.
Similar to DWANG4M8, the Rocket Launcher will reign supreme. The Super Nailgun is pointless due to placement, the Double-Barrelled Shotgun due to the size of the map, and the Thunderbolt due to the lack of Ammo.
The inclusion of Water can make this level a bit more interesting, though the plentiful amount of Teleporters means a player won't be in the Water for a lengthy amount of time. Still, the level does have more blind spots and less mobility room, meaning a control point doesn't really exist.
This level could work as a Tourney as a grab and go based combat. As usual, a one-room level bores me, though I can see the purpose of this level and see how it might be appealing to some. I am not exactly sure of the purpose of the interior Teleporters as they simply lead to the nearest platform (originally they were needed to leave the pits in the Doom based version).
Unlike DWANG4M8, this level isn't terrible. I don't believe four players would make for an interesting match, but a tourney might be possible. It just isn't my taste, both due to the broken nature of the weaponry (some fall through the level on a restart) or the one-room environment that I described before.