This game's pretty fun (and insanely well done for a 5 day game jam)!
The minimalism you used here complements the 'one button' theme really well. The gameplay isn't overly complex and the SFX/Cover Art works well here too.
On my first few plays I thought that the overall pace of the game could be increased, but I realised after seeing the previews that the browser version runs much slower than the .exe. I'd recommend putting up a notice to suggest downloading the game (or limiting it to downloads) so everyone experiences the best version of this.
But all in all, this is really well done. I'm looking forward to seeing the potential future additions to this one!