The game design is quite strong. The loop is rock solid, with smooth movement. It's just plain fun to move around, aiming is very easy with the mouse and line, and the frantic pace of the game is balanced out by breaks for upgrading between the ever faster waves, allowing you to choose how to strategize in the future with great possibility for emergent tactics. It's just a visceral joy to dodge and weave through the playing field choosing the right moments to strike, and how. There is some oddness like not being able to predict how the potato will bounce off enemies, making combo strategies difficult, being in danger staying near the edges of the screen as enemies don't telegraph spawning in, or not being able to differentiate which potato flying around is the throwable one until it stops moving. But the gripes are minor and there is a huge amount of raw fun to be had here, making it all the more remarkable this polished work was made in a mere manner of 48 hours.
The mere act of being able to choose how you spend your upgrade every 10 enemies while the difficulty continues to climb keeps things perpetually interesting, and you keep asking, oh, I know I can get further next time. I can change strategies, do different upgrades, have different luck, etc. It's quite addictive with that 'easy to play, difficult to master' level of approachability. Combine that with the potential for emergent tactics, and it's simple presentation hides an engrossing little game.
Add on top of that a great visual style with the simple pixel art but made all the more excellent through the use of a CRT filter and admittedly a bias in the excellent sound work and music, what on paper seems really simple is just a damn fine game with all the bells and whistles you could expect out of an unassuming but intense arcade romp!