"Treasure Hunters" is a platform game, maybe a bit simple, but fun. Please note that this review is for the Spectrum Next version.
You are a pirate who wants to obtain all the gems which are scattered over the world. OK, fine, but I think that a few indications and tips along the game, for example, in the signs you encounter (pirate flags, pieces of ships, etc) would have vastly improved the playability, as the maps are huge. The most impatient players might get bored after some minutes walking, only getting gems and fighting the same 2-3 enemies, without finding anything a bit different, nor any guide of where to go, or something that explain the main objectives (get abilities to reach new zones).
The game requires you to find key items, which allows player to reach previously unexplored areas. For example, by making double jumps, or breathing underwater. However, and to my surprise, those special items aren't marked on the map, which IMHO is a flaw, as many times the player doesn't know where to go and keeps walking around the huge maps without a clue. Again, signals or tips regarding this localizations would have been great, as they would give the player a clear objetive, and a reason to continue playing, to get the announced "new ability" that lies ahead.
Still, with the mentioned little problems, the game is very good. The graphics are a delight, very cartoonish; music and FX are exceptional, specially the chiptunes, which sound great; and the playability is maybe a bit basic, but also catchy, specially if you have the patience to find the new abilities. The giant bosses are also great, but some kind of intro or presentation would have made them more charismatic to the player. So, there may be still room to improve it, but overall it's a very good title, which deserves to be in the list of the best platform games for the Spectrum Next.