Good presentation, UI, pacing, music choice, and although it's a bit light at the moment the plot is intriguing. I'd come back for Stage 2.
Small quibbles: Once RP are displayed they overlap other text on my phone browser version. The scroll bars are too small to accurately use with a touchpad and there's no click and drag scrolling equivalent, so navigating vertically in menus is a pain. At times the horizontal data for a menu tab exceeded the width of the frame and put up a horizontal scroll bar for that 05% ish of the material. The main menu music ends in a fade, just perceptible dead stop, then restarts with that first relatively hard note, so it doesn't work as looping audio very well. It'd be nice if there were competing focii for our resources or attention, in the current version the next appropriate thing to click always felt super obvious. (There's a little work there in layering things across menu tabs and having different boosters cost from the same cash pool, but the way expenses scale with level make constantly spreading the cash around the obvious choice.)
Again, I enjoyed it so far!