I noticed a pretty nasty bug that makes the game completely unplayable on newer/gaming monitors.
At first I was completely and utterly pulling my hair out at the sheer difficulty. I mean, I have played Super Meat Boy, and yet I could not get past the third level of this game! I died over 100 times in level 3 alone, it felt like the game was just plain running too fast. The water just zooms up at the point where you pretty much have to speed-run the entire level, the green lizard character was hopping around with the speed of Sonic but with very little control, it barely would cling to wall for a quarter of a second before falling, it felt like I never had even close to enough time to react to anything, as if the entire game was running in fast forward....
.... and it turns out, that's exactly what was going on. I have a 144hz monitor, and I have seen this issue before with 2D games that have v-sync enabled. Many of them just simply advance the game by one frame every time the monitor refreshes, issue is, many also fail to take into account that there are monitors that operate at 120hz, 144hz, or even 240hz. Meaning the game can run anywhere from twice to FOUR times as fast on these monitors. And depending on the game, not all elements are even synced to the refresh, so it's possible for some elements of the game to run far faster than they are supposed to, but not others.
I have seen this exact issue crop up in other 2D games, I experienced it in Shovel Knight (was able to temporarily fix it by turning off V-Sync until the game was patched), Phantom Breaker (no option to disable V-Sync, so had to wait for a patch) and specific levels in Fox n Forest (no option to disable v-sync AND was not patched).
As soon as I used a setting to force my monitor into 60hz mode, this game became significantly more playable and felt like it was running in slow motion (likely because I was so used to it running so much faster). So this might be something you want to look into, more and more monitors are being manufactured with refresh rates of 120, 144, or 240hz nowadays, and this game is unplayable on all of those because of this.