Upgrade Exploit (Any% only):

Just simply hold the "shift" key while buying all of the upgrades in the image below. https://imgur.com/TF0HZCw Additionally, hold "shift" when clicking "Play Frog Fractions!" to skip right to the upgrades screen without having to eat any bugs.

DDR Intro Skip:

Mash space bar at the end of the dream sequence (after the text section). If the text box in the image below is still active, then you will perform the skip. Since you cannot control when the text box appears, this trick is completely luck dependent. This skip will occur because the game tries to overlap two text boxes at the same time, which causes the second text box to never appear. https://imgur.com/P4m3wPL

Ending DDR Early:

Play the DDR section without the performance meter going below half for approximately 57 seconds after playing the first note. Then, stop playing. This will cause the text box in the image below to take priority over the text box that signifies the end of the song, and the game will immediately move on to the next section. https://imgur.com/a/zKB8I4r

(1/20/2020 Update) Spaceship Skip (Any% Only):

Simply type "really win" to win!