Glad you like it! I'm aiming for 16 stages (12 "real" stages and 4 boss battles), hopefully there's enough ways to keep the core gameplay fresh even when stretched out that far... (there's more equipment in the game than is accessible in the demo, and in the final version I'll throw in a bunch more Touhou references as well, since there not being enough of those was a common complaint)... I finished stage 7 yesterday but there's plenty of side content and polish to do so I'm still far from the actual 50% progress mark... you'll have to stay tuned a bit longer, I'm afraid ^^'
The story is a bit of a last-second addition but I'll try to tackle some interesting themes now when I have time to flesh it out! Capitalism and violence are more relevant than ever right now, sadly...