The incremental games by adriendittrick are always a blast, and this one is much of the same; the different combos you can build up are great fun, and it's super satisfying to absolutely obliterate everything. The sprites are charming, too, and I especially like the flavour text of attacks.
The only issue I had was with the final area. At that point, I found the only way I could beat the final boss was with Nidhogg and Fenrir, and it did rely a bit on RNG, since it had to not pick the same move two times in a row . It was a shame to say goodbye to Boost, too ;(
Other than that, though, I loved this little game! Great work.