I only played the hard mode but the game is really compelling. Once you grok what the task is for each placement of the hextominos (?) (hex tile preset layout pieces) the time pressure adds some really nice tension.
If you fail to place a tile in time, the game force places the piece somewhere on the board that you won't have planned for. This changes the landscape and makes you completely reconsider the new options advantageous to you. The randomly placed tile gives you a new color island to utilize while beginning a border/enclave inside an area you previously planned for another color.
Art direction is perfect for the gameplay and the inclusion of a leaderboard is clever to incentive replay-ability.
You are very literally building something to scale. Great execution.