If anyone needs it, I created a AutoHotkey script (v1.1) to play this game just with the keyboard (German keyboard). "Y(Z) - B" to select pets in the shop, "A - G" to place them in the squad, "K - L" to select fruits, "-" to freeze stuff, 0 (NumPad) to reroll, "," or "." (NumPad) to proceed to next round. Use the following text for the script on a 1920:1080 resolution (other resolutions probably need an adjustment of MoveMouse values):

#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn ; Enable warnings to assist with detecting common errors.
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir% ; Ensures a consistent starting directory.

#MaxThreadsPerHotkey 3

Numpad0::
MouseMove, 150, 1000
Sleep 5
Click
return

NumpadDot::
MouseMove, 1800, 1000
Sleep 5
Click
return

-::
MouseMove, 1100, 1000
Sleep 5
Click
return

y::
MouseMove, 350, 700
Sleep 5
Click
;Send {Click Down}
return

x::
MouseMove, 500, 700
Sleep 5
Click
;Send {Click Down}
return

c::
MouseMove, 700, 700
Sleep 5
Click
;Send {Click Down}
return

v::
MouseMove, 850, 700
Sleep 5
Click
;Send {Click Down}
return

b::
MouseMove, 950, 700
Sleep 5
Click
;Send {Click Down}
return

a::
MouseMove, 350, 400
Sleep 5
Click
return

s::
MouseMove, 500, 400
Sleep 5
Click
return

d::
MouseMove, 700, 400
Sleep 5
Click
return

f::
MouseMove, 850, 400
Sleep 5
Click
return

g::
MouseMove, 950, 400
Sleep 5
Click
return

k::
MouseMove, 1350, 700
Sleep 5
Click
return

l::
MouseMove, 1500, 700
Sleep 5
Click
return