Thanks for trying the game and leaving feedback!
Sorry to hear that it doesn't run well for you. May I ask what CPU you are using and for how long you can play?
I'm planning to update the game every now and then to add new features and fix problems. But since this is currently just a hobby project, things might take a while. Not sure yet if a save system is the best solution for the game (as implementing this will take quite some time and the game is only 30 mins long), but I will definitely look into optimizing the game concerning performance, which might lead to it being playable by a wider range of people (and CPUs ^^).