This looks very cool! I really liked music and pixel-art. One thing, that my mouse drew the ink line not very accurate sometimes and I don't know: Am I doing something wrong or it's just happens?
Thanks! It wasn't explicitly explained, but you cannot draw on platforms or holes, only on walls. Could that be causing the inaccuracy?
Yes, I think so! Heatboxes not always obvious, but now I can reach the top - really cool!
