Been playing this for a few days now and really enjoying it. Definitely worth the price tag. The difficulty is perfect for me on Normal. Although, they are a bit generous on the respawn checkpoints on death. I haven't played hard yet, but hopefully the checkpoints always start at the beginning or at least limit you on continues. I definitely agree with basically everything in the Electric Underground video. It's a shame they didn't put in an entire game time attack. Hopefully that gets patched in. My only minor gripe is the cover art and splash screen in game. Looks like cheap art. Definitely does not do the game justice. The in game art and music is on point though.
I'm on stage 5 now. Stage 4 is where the difficulty ramps up. One thing I have learned in my short time playing, is do not hoard your weapons. They are much more useful in the stages than on the bosses. At least through stage 4.
BTW, the stage 3 boss is awesome. He could pass for a final boss in any other 16-bit era inspired game. The stage 4 boss, although not as impressive is really fun. She really keeps you on your toes.
I've been looking for some speed runs to see how people progress through stages 1-4. I'm not going to watch an entire playthrough until I beat the game. I'm finding it pretty difficult to make it past some areas unscathed. It will be nice to see how some people navigate the levels.
One tip I would give is do not set dash to double tap forward. There are some areas you will need to rapidly tap without dashing or you will take damage on accident.
So far this game is easily a 9/10 for me. The attention to detail and gameplay mechanics should be par for other retro inspired games.