Fantastic 0.12m Danmakufu game by Lidera, it's kind of the predecessor to Magical Singular Day. I couldn't find any videos of Lunatic mode on KZread, so let's fix that.
MarisaA is UFO MarisaB if she was awesome, great power, the backshot is actually useful, and both bombs are quite strong as well.
IDT's main system revolves around the Power meter (which doesn't actually increase shot power as far as I'm aware), it caps out at 5.000. When you have at least 1.000 Power, you can press the user key (C by default) to activate a border which auto-collects all items and also makes you autobomb if you run into a bullet, pressing C while the border is active will cancel it early and clear out a much smaller area of bullets compared to letting it cancel naturally. While a border is active, you can also manually input a bomb which lets you perform this omega bomb that deals way more damage, great for skipping patterns.
This game doesn't come with music, so I've added my own :)
Download (BGM not included): drive.google.com/u/0/uc?id=1Z...