Thanks a lot for the kind words! That’s a good point about the directional buttons, I actually copied the sprite from the loading screen out of laziness, but I can see it becoming a little confusing.
Yeah, the tutorial is a bit of a tough nut to crack. On the one hand, we wanted the game to be simple enough to play without fully understanding all the systems, on the other hand, we did want players to be able to read up on those systems if they wish to do so. Maybe having short in-game tutorials for the most important bits would be the way to go here, but honestly, I’d rather not open that can of worms right now (maybe in the future, though).
Unlocked achievements actually can be viewed: First, click on the book on the main menu screen. Then, on the top of the newly opened screen, click on the trophy bookmark.
Adding a defeated counter to the endless mode is a good idea, noted!