I wanna be the Locus
One of the great older fangames. I didn't have any high hopes for this one, and these hopes didn't go up in the first stage. It's not generic, but the traps aren't anything outstanding or funny (Maybe surprising once in a while), and the moving enemies are far more annoying than you can possibly imagine. However, Stage 2 is the one used in the Stage Rush of Cultured, and you can tell that the game's quality goes up (And the difficulty probably goes down a bit). The level design gets more creative, and the visuals are more pleasant to look at. With few exceptions, it's also great gameplay-wise.
Stage 3 brings us the gimmicks. I have mixed feelings about this stage. At one hand, I love the creativity of some gimmicks, and how well are they used for the most part, and yet, one thing kills the whole stage: The invisible kid. The concept is great, and it could even be fun to use this gimmick, but the game didn't use this concept to its fullest. The result is the last save of the stage, probably the most annoying in the whole game.
Stage 4 is by far my favorite. This time, you're in a water stage, and must get through lots of passages to unlock new paths, while avoiding stuff such as eletric waves, traps and ocasionally some basic needle jumps. This is the most brutal stage of the game when it comes to chases, and the needle jumps are casually placed in an unmerciful way. Nevertheless, the level design is one of the best I've ever seen in a fangame (Nothing feels out of place, all the spikes and obstacles you'll see really feel like they belong to the stage. All of them. And that's very, very rare to see in a fangame), and the visuals are great as well. It feels like a completely different game.
The boss is great, as well. It's not as hard as most of the platforming, but it's still a bit hard, without being unfair. There's always room for you to escape (Almost always, actually), and the fight is very fun overall. Plus, the boss is cute.
The secrets, on the other hand, are a true letdown. Stage 1 and Stage 2's secrets are very uninteresting and even boring, to a certain extent. Stage 2's secret is also very confusing to reach, with a completely unnecessary placement for some triggers. Stage 3's secret is terrible. The first and the last jumps are two things that I just want to never go through again. Stage 4's secret is the only one that is somewhat interesting, it lives up to the stage's platforming to a certain extent.
However, these secrets are needed for the next part of the game: The extra stage. This stage is just wonderful. There are diagonal spikes, which allows the game to introduce a lot of interesting needle jumps. There are moving wheels, and switches that will make the lava move according to your needs. Everything is very well-designed and original, and just like Stage 4 it's something that you probably won't see in another fangame. Also, the background gets more and more red according to how deep you go in the stage, which creates a very interesting atmosphere. I actually like it at least as much as I like Stage 4. Maybe even more.
Then, the extra boss comes. Another letdown. It's a simple avoidance with standart visuals (I just got out of one of the most amazing extra stages I've ever seen to face...This?), and mostly uninteresting attacks. I just can't bring myself to like it. It's still not bad enough to ruin the game, though, it's just...Nothing outstanding, in a very outstanding game.
There are a couple issues with the game, such as the restarting musics (They are great, and the death music is nice, but knowing the game's difficulty, you won't get to enjoy much of them), Stage 1 and the secrets, but nothing serious, and I believe that Stage 1 is intended to be bad (It's still an issue, though). Also, the extra stage makes up for the secrets.
Basically, this game gets better and harder as you progress through it. So, if you believe you're skilled enough, I definitely recommend it. Otherwise, I highly advise you to stay away to polish your skills for a little longer.