Tileset, by 
This tileset captures the essence of JJ1’s Dreempipes with sceneric crystals added in. It manages to have 2 types of ground tiles (well, I count the metal edges different enough) and 2 types of Layer 5 backgrounds. There’s poles, vines, hooks, tubes, blocks, and signs as well, which is all great for a 150 tile limit!
The drawing style of the crystals and especially the clouds may be a tad odd to go with the rest of the set, but then again I’m not that good at judging art.
Biggest drawback may be the waterfall tiles needing AngelScript to properly animate. While it is indeed a blessing that such things can be accomplished by palette swapping to save tile space, it did give me some framedrops while playing the example level. And even though you can copy-paste the necessary script to your own level to get the same animated effects (also note the cool sparkling effect on the crystals!), it doesn’t really add to the convenience for the level maker and the player.
Speaking of the example level, it was short but fun to play nevertheless. The gameplay felt like Dreempipes with switches (crates in this case) that make the water level rise, opening up higher areas and secrets in lower areas. All well done for just 4 hours of work!
Overall I recommend this set for advanced users, since like most small sets it needs AngelScript to make a level look special enough to match up with the big boys, even while the set itself looks well-drawn and is very usable.
