* Graphics (9/10)
The graphics are amazing as for the fan-game. The textures are pretty rich and suit levels pretty well.
* Music (10/10)
The music is amazing and well-suited. I've added the soundtracks to my playlist and listen them from time to time.
* Level design (6/10)
First three levels are rather simple and novice-friendly. The difficulty raises significantly on the level 4, posing a good challenge.
The levels are focused more on killing enemies and enemy spawn triggers, rather than classic platforming. I actually liked triggers in most of the places. Some trial and error is necessary, but it gets manageable when you know what kinds of enemies can spawn on the segment. Some segments go too much with it though.
The game has quite a lot of long saves. The final sections of some of them can be pretty tedious, e.g. chest jumps in world 4 tower climb. This makes these saves frustrating. Also, some of long saves which are mostly easy, but has tedious parts in the end.
IMO, world 4 has the best platforming in the game. World 5 platforming is shorter and easier than world 4 and brings almost no new elements.
* Bosses (8/10)
I've got a lot of fun fighting bosses. Some of their attacks can be tedious to learn, but it was fun for me to figure out how to dodge them. As bosses choose attacks randomly, sometimes it was required to figure out how to dodge one specific attack when it happens after another specific attack. Positioning was also important.
For all bosses except world 4 boss Altace rng-induced imbalance is minor. Some attacks or combinations are harder to learn than others, but situations when rng favors or penalizes you too much are rare.
Some combinations of 3-4 Altace's attacks can screw you over if happen consequently, mostly involving spell bombs and chasing circles. Bombs hit-boxes aren't shown and are quite big for blue spell bombs, so figuring out what's possible to do is trial and error. Also, some combinations of attacks are significantly easier than others. As result, defeating this boss took quite a lot of grinding for me, though maybe I'm just bad :)
World 5 boss, Gustav, is fun to play. Though a little criticism here as well. There is a tedious attack at the end of the phase 3, increasing the amount of grind required to beat the boss. Attacks in middle of the phase switch behave weirdly. For example, attacks where he throws circles in all directions or makes an explosion become phase 2 versions, even if started in the phase 1. However, the attack when he fires two large fireballs left and right isn't replaced, though having similar visual signs as the attack when spears are thrown at you. The later is also confusing for reflexes.
The game has a story, but it's not translated to English, so I can't tell anything about it.
Note, that the game saves the state in external folder, which is C:\Users\<User>\AppData\Local on Windows 7. It can be useful if you like to practice for speedrunning or want to play on a different computer.
* Overall (8/10)
I like the production value, bosses fights and some parts of platforming and thus giving high mark.