That is certainly one method, everyone Blobs in their own way! It does get easier the more keys you're pressing, I've found "mashing" a region of the keyboard is the best way to move quickly. Past 5-6 keys you might get diminishing returns, spreading yourself too thin, so that's sort of the sweet spot.
Sorry for the performance woes, this is definitely something we'll work on for a post-jam patch. The physics also get pretty wild at low frames we noticed. Thanks for sticking it out and giving Blobbert a shot! :)