There is not the boss who only avoids it to music in this Iwanna.
The degree of difficulty is a product for seniors.
A puzzle element and a gimmick exist.
This game is a numerous long piece, so the person who would like to play lengthily play by all means, please.
Very good-looking fangame with plenty of stages. I really hated some of the stages (The HP Bar Stage was way too annoying, thanks to the 2-minute-long saves) and some particular saves (Last save of the first Desert Stage was boring as hell, thanks to two specific boxes that required lots of backtracking). Also, the last boss is way too boring (Takes around 4 minutes, maybe 5, and the attacks are either, completely luck-based, or easy and tedious as hell). But other than that, the game is quite good. Be warned that tight maneuvering is required at most stages, though, and the bosses are mostly RNG-heavy.
Some parts are quite frustrating and unnecessary, but the game is mostly good. Would recommend.