Here's a youtube video of the playthrough:
I hope it helps. I cut out grinding for credits once & setting-up the internals.
Good hack & slash, I can tell you're a big fan of the genre! I didn't notice any bugs and it seems very well developed so far Character customization is very cool! Honestly, the whole earn-credits-upgrade-retry-trial seems really cool and has a lot of potential. For the demo, I would suggest just giving people a lot of credits to spend to buy things from the store so they can try out all the mechanics without having to grind. As you can see in the playthrough I tried fighting maxotaur a couple times without realizing I had a bunch of modules I could install, so maybe add a UI element that shows uninstalled modules that could fit. Also, I talk about this in the video but when modifying internals maybe add an "optimize" button that would optimize the location of all currently installed modules.
One of my suggestions is to add more cancel options (i.e. cancel a dash into an attack/block/jump, attack into dash/block/ jump, etc.) so that way player could do more stylish combos. Or make cancel routes modules for the player to buy & install. That'd be cool to and synergizes well with the existing gameplay you have now! Also, I'd suggest being able to combo dead enemies a bit & being able to continue combos between enemies, I was trying to launch the more basic enemies but they'd die so quickly I wouldn't get to that part of the combo.
I've only played it for a little over half-an-hour (trying to play through more DD submissions first) but I'll definitely come back to this and leave a more detailed review afterwards.
Honestly, I think you're working on something with a lot of potential here! I better see you tweeting & making youtube videos because I would HATE to see this thing not do well! Just think of it as part of the development process (i.e. X videos by version 0.3.0, weekly devlogs by version 0.4.0, etc.). If you're worried about video editing tools blender isn't terrible and is free.