Just a warning, this comment has some spoilers.
Let's go to Heaven was honestly an amazing read. Even from the start language is used masterfully to evoke a specific type of feeling while still actually making the actual words make sense. That is honestly, way harder to do then it sounds and definently harder then you've made it look here. The way sex is described, does an amazing job of both being actually erotic and feeling so hollow that you know that Deimos is basically unable to get into it. This also ends up playing into how they become gods really nicely, with Deimos going from feeling like someone who's bored and hollow to someone who has basically no will for herself. It's fascinating to see how that makes her puppetted by someone else's desires even while she is disgusted by them. This is especially noticable after going through it a second time to find that there was no changes no matter what you choose, even when they were meaningfully different.||
I think for main criticisms, a ton of energy is spent building it up so that the whole piece has a certain feel but most of that is done for setting the tone. After that's been done, that sort of eerie feeling where nothing is quite grounded ||Is really only dropped off at the very end. While that is a nice touch, it leads to there being a lot of emotional points that feel very similarly because they're all in the same soup. Stuff like panic, apathy, desire, and disgust all have a similar feeling throughout, and it'd been nice if there was a bit more distinction to each of them.||
That being said, one of my two favorites at the moment. I really liked the characters here, they played together really nicely and that's on top of the use of language.