After the first few levels this feels like it's going to be an amazing game:
1) Egyptian adventure world with mummies, scarabs, jungles, ancient stone buildings, and lost treasure galore.
2) Puzzles and secrets, with magically sealed doors to unlock and alcoves hidden by burnable vines. And the puzzles are fairly varied.
3) Varied enemy types, eg. Zombie-like hordes of mummies versus tough, giant scorpions that come in pairs, and elite mummy soldiers that hide behind shields versus archers shooting from out of reach.
4) And initially quite varied levels, with some emphasising exploring, others puzzles, some fighting swarms in more open terrain, others with jump scares in narrow tunnels.
5) The terrain is quite interactive, including plenty of, again varied types of, traps that you can set off to help during battle.
Unfortunately, it quickly starts to lose the feeling of variety and becomes both boring and draining:
1) Swarming soon becomes the norm.
2) During swarm phases, you're always sealed in an arena-like area. No escape, Minimal strategising.
3) Bosses are 99% invincible and have just a sliver a blue light where they can take damage. It also moves location in rounds (eg. Once you manage to damage one with a glowing blue eye, the light moves to the back of its neck and you can then only damage it from behind, and once you do it moves under its armpits, etc).
For those reasons, it's only artificially difficult, and not nearly as fun as it could be.